ONE GROUP
485APOS, 1997-08-29
Previous: ONE GROUP, 485APOS, 1997-08-29
Next: ONE GROUP, N-30D, 1997-08-29



<PAGE>   1
   
     As filed with the Securities and Exchange Commission on August 29, 1997
                     Registration Nos. 2-95973 and 811-4236

                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM N-lA

          REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 / X /

                         POST-EFFECTIVE AMENDMENT NO. 43          / X /
                    
                                       and

          REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT / X /
                                     OF 1940

                                AMENDMENT NO. 44                  / X /

                                THE ONE GROUP(R)
               (Exact Name of Registrant as Specified in Charter)

                              1111 POLARIS PARKWAY
                                 P.O. BOX 710211
                            COLUMBUS, OHIO 43271-0211
                    (Address of Principal Executive Offices)

                                 (800) 480-4111
                         (Registrant's Telephone Number)

                                 GEORGE MARTINEZ
                                3435 STELZER ROAD
                              COLUMBUS, OHIO 43219
                     (Name and Address of Agent for Service)

                                   Copies To:

     Alan G. Priest, Esquire                   Michael V. Wible, Esquire
     Ropes & Gray                              Banc One Corporation
     One Franklin Square                       100 East Broad Street, 18th Fl.
     1301 K Street, N.W., Suite 800E           Columbus, Ohio  43271
     Washington, D.C.  20005

It is proposed that this filing will become effective (check appropriate box)

      /   /    Immediately upon filing pursuant to paragraph (b)
      /   /    on (date) pursuant to paragraph (b)
      / X /    60 days after filing pursuant to paragraph (a)(1)


    

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 011
   <NAME> THE ONE GROUP PRIME MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2862268
<INVESTMENTS-AT-VALUE>                         2862268
<RECEIVABLES>                                    48556
<ASSETS-OTHER>                                     401
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2911225
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14193
<TOTAL-LIABILITIES>                              14193
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2897025
<SHARES-COMMON-STOCK>                          2563763<F1>
<SHARES-COMMON-PRIOR>                          2186583<F1>
<ACCUMULATED-NII-CURRENT>                            7
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2897032
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               154583
<OTHER-INCOME>                                       9
<EXPENSES-NET>                                   14237
<NET-INVESTMENT-INCOME>                         140355
<REALIZED-GAINS-CURRENT>                            27
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           140382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       124100<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        4681923<F1>
<NUMBER-OF-SHARES-REDEEMED>                    4309729<F1>
<SHARES-REINVESTED>                               1986<F1>
<NET-CHANGE-IN-ASSETS>                          395096
<ACCUMULATED-NII-PRIOR>                              7
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          27
<GROSS-ADVISORY-FEES>                             9724
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  16741
<AVERAGE-NET-ASSETS>                           2441674<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .051<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .051<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .48<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 012
   <NAME> THE ONE GROUP PRIME MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2862268
<INVESTMENTS-AT-VALUE>                         2862268
<RECEIVABLES>                                    48556
<ASSETS-OTHER>                                     401
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2911225
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14193
<TOTAL-LIABILITIES>                              14193
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2897025
<SHARES-COMMON-STOCK>                           332643<F1>
<SHARES-COMMON-PRIOR>                           315373<F1>
<ACCUMULATED-NII-CURRENT>                            7
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2897032
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               154583
<OTHER-INCOME>                                       9
<EXPENSES-NET>                                   14237
<NET-INVESTMENT-INCOME>                         140355
<REALIZED-GAINS-CURRENT>                            27
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           140382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        16246<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        1994727<F1>
<NUMBER-OF-SHARES-REDEEMED>                    1992191<F1>
<SHARES-REINVESTED>                              14734<F1>
<NET-CHANGE-IN-ASSETS>                          395096
<ACCUMULATED-NII-PRIOR>                              7
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          27
<GROSS-ADVISORY-FEES>                             9724
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  16741
<AVERAGE-NET-ASSETS>                            336381<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .048<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .048<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .73<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 013
   <NAME> THE ONE GROUP PRIME MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2862268
<INVESTMENTS-AT-VALUE>                         2862268
<RECEIVABLES>                                    48556
<ASSETS-OTHER>                                     401
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2911225
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        14193
<TOTAL-LIABILITIES>                              14193
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2897025
<SHARES-COMMON-STOCK>                              619<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            7
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2897032
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               154583
<OTHER-INCOME>                                       9
<EXPENSES-NET>                                   14237
<NET-INVESTMENT-INCOME>                         140355
<REALIZED-GAINS-CURRENT>                            27
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           140382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            9<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1202<F1>
<NUMBER-OF-SHARES-REDEEMED>                        589<F1>
<SHARES-REINVESTED>                                  6<F1>
<NET-CHANGE-IN-ASSETS>                          395096
<ACCUMULATED-NII-PRIOR>                              7
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          27
<GROSS-ADVISORY-FEES>                             9724
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  16741
<AVERAGE-NET-ASSETS>                               374<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .026<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .026<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                   1.51<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 021
   <NAME> THE ONE GROUP US TREASURY SECURITIES MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2779488
<INVESTMENTS-AT-VALUE>                         2779488
<RECEIVABLES>                                     5867
<ASSETS-OTHER>                                     813
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2786168
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        12579
<TOTAL-LIABILITIES>                              12579
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2773395
<SHARES-COMMON-STOCK>                          2243208<F1>
<SHARES-COMMON-PRIOR>                          1844578<F1>
<ACCUMULATED-NII-CURRENT>                           43
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            151
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2773589
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               133807
<OTHER-INCOME>                                     204
<EXPENSES-NET>                                   12181
<NET-INVESTMENT-INCOME>                         121830
<REALIZED-GAINS-CURRENT>                           190
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           122020
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       105790<F1>
<DISTRIBUTIONS-OF-GAINS>                             5<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        4920570<F1>
<NUMBER-OF-SHARES-REDEEMED>                    4522461<F1>
<SHARES-REINVESTED>                                521<F1>
<NET-CHANGE-IN-ASSETS>                          818135
<ACCUMULATED-NII-PRIOR>                             43
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          34
<GROSS-ADVISORY-FEES>                             8665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  15316
<AVERAGE-NET-ASSETS>                           2135350<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .050<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .050<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .46<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 022
   <NAME> THE ONE GROUP US TREASURY SECURITIES MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2779488
<INVESTMENTS-AT-VALUE>                         2779488
<RECEIVABLES>                                     5867
<ASSETS-OTHER>                                     813
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2786168
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        12579
<TOTAL-LIABILITIES>                              12579
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2773395
<SHARES-COMMON-STOCK>                           530136<F1>
<SHARES-COMMON-PRIOR>                           110865<F1>
<ACCUMULATED-NII-CURRENT>                           43
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            151
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2773589
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               133807
<OTHER-INCOME>                                     204
<EXPENSES-NET>                                   12181
<NET-INVESTMENT-INCOME>                         121830
<REALIZED-GAINS-CURRENT>                           190
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           122020
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        16039<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        1492429<F1>
<NUMBER-OF-SHARES-REDEEMED>                    1081910<F1>
<SHARES-REINVESTED>                               8752<F1>
<NET-CHANGE-IN-ASSETS>                          818135
<ACCUMULATED-NII-PRIOR>                             43
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          34
<GROSS-ADVISORY-FEES>                             8665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  15316
<AVERAGE-NET-ASSETS>                            340317<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .047<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .047<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .72<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 023
   <NAME> THE ONE GROUP US TREASURY SECURITIES MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          2779488
<INVESTMENTS-AT-VALUE>                         2779488
<RECEIVABLES>                                     5867
<ASSETS-OTHER>                                     813
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2786168
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        12579
<TOTAL-LIABILITIES>                              12579
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2773395
<SHARES-COMMON-STOCK>                               49<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                           43
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            151
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   2773589
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               133807
<OTHER-INCOME>                                     204
<EXPENSES-NET>                                   12181
<NET-INVESTMENT-INCOME>                         121830
<REALIZED-GAINS-CURRENT>                           190
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                           122020
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            1<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             73<F1>
<NUMBER-OF-SHARES-REDEEMED>                         25<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                          818135
<ACCUMULATED-NII-PRIOR>                             43
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          34
<GROSS-ADVISORY-FEES>                             8665
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  15316
<AVERAGE-NET-ASSETS>                                62<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .024<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .024<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                   1.48<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 031
   <NAME> THE ONE GROUP MUNICIPAL MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           524569
<INVESTMENTS-AT-VALUE>                          524569
<RECEIVABLES>                                     3715
<ASSETS-OTHER>                                    1596
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  529880
<PAYABLE-FOR-SECURITIES>                         12581
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1694
<TOTAL-LIABILITIES>                              14275
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        515748
<SHARES-COMMON-STOCK>                           467546<F1>
<SHARES-COMMON-PRIOR>                           459924<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             130
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            13
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                    515605
<DIVIDEND-INCOME>                                  168
<INTEREST-INCOME>                                18652
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2363
<NET-INVESTMENT-INCOME>                          16457
<REALIZED-GAINS-CURRENT>                          (10)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            16447
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        15228<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                        1104184<F1>
<NUMBER-OF-SHARES-REDEEMED>                    1096700<F1>
<SHARES-REINVESTED>                                138<F1>
<NET-CHANGE-IN-ASSETS>                            5078
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            127
<OVERDIST-NET-GAINS-PRIOR>                           4
<GROSS-ADVISORY-FEES>                             1836
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3044
<AVERAGE-NET-ASSETS>                            482153<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .031<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .031<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .43<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 032
   <NAME> THE ONE GROUP MUNICIPAL MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           524569
<INVESTMENTS-AT-VALUE>                          524569
<RECEIVABLES>                                     3715
<ASSETS-OTHER>                                    1596
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  529880
<PAYABLE-FOR-SECURITIES>                         12581
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1694
<TOTAL-LIABILITIES>                              14275
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        515748
<SHARES-COMMON-STOCK>                            48200<F1>
<SHARES-COMMON-PRIOR>                            50734<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             130
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            13
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                    515605
<DIVIDEND-INCOME>                                  168
<INTEREST-INCOME>                                18652
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2363
<NET-INVESTMENT-INCOME>                          16457
<REALIZED-GAINS-CURRENT>                          (10)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            16447
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1229<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                         207786<F1>
<NUMBER-OF-SHARES-REDEEMED>                     211467<F1>
<SHARES-REINVESTED>                               1147<F1>
<NET-CHANGE-IN-ASSETS>                            5078
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            127
<OVERDIST-NET-GAINS-PRIOR>                           4
<GROSS-ADVISORY-FEES>                             1836
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3044
<AVERAGE-NET-ASSETS>                             42284<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .029<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .029<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .68<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 041
   <NAME> THE ONE GROUP INCOME EQUITY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449883
<INVESTMENTS-AT-VALUE>                          806202
<RECEIVABLES>                                     3268
<ASSETS-OTHER>                                      16
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  809486
<PAYABLE-FOR-SECURITIES>                           511
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1474
<TOTAL-LIABILITIES>                               1985
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        395370
<SHARES-COMMON-STOCK>                            29591<F1>
<SHARES-COMMON-PRIOR>                            18230<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               5
<ACCUMULATED-NET-GAINS>                          55817
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        356319
<NET-ASSETS>                                    807501
<DIVIDEND-INCOME>                                13965
<INTEREST-INCOME>                                 2052
<OTHER-INCOME>                                     105
<EXPENSES-NET>                                    6172
<NET-INVESTMENT-INCOME>                           9950
<REALIZED-GAINS-CURRENT>                         63053
<APPREC-INCREASE-CURRENT>                        89271
<NET-CHANGE-FROM-OPS>                           162274
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         8563<F1>
<DISTRIBUTIONS-OF-GAINS>                         10510<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          17034<F1>
<NUMBER-OF-SHARES-REDEEMED>                       6085<F1>
<SHARES-REINVESTED>                                412<F1>
<NET-CHANGE-IN-ASSETS>                          412221
<ACCUMULATED-NII-PRIOR>                             13
<ACCUMULATED-GAINS-PRIOR>                         6440
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4104
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6228
<AVERAGE-NET-ASSETS>                            449534<F1>
<PER-SHARE-NAV-BEGIN>                            17.65<F1>
<PER-SHARE-NII>                                    .36<F1>
<PER-SHARE-GAIN-APPREC>                           4.89<F1>
<PER-SHARE-DIVIDEND>                               .36<F1>
<PER-SHARE-DISTRIBUTIONS>                          .61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.93<F1>
<EXPENSE-RATIO>                                   1.00<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 042
   <NAME> THE ONE GROUP INCOME EQUITY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449883
<INVESTMENTS-AT-VALUE>                          806202
<RECEIVABLES>                                     3268
<ASSETS-OTHER>                                      16
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  809486
<PAYABLE-FOR-SECURITIES>                           511
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1474
<TOTAL-LIABILITIES>                               1985
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        395370
<SHARES-COMMON-STOCK>                             3606<F1>
<SHARES-COMMON-PRIOR>                             2510<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               5
<ACCUMULATED-NET-GAINS>                          55817
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        356319
<NET-ASSETS>                                    807501
<DIVIDEND-INCOME>                                13965
<INTEREST-INCOME>                                 2052
<OTHER-INCOME>                                     105
<EXPENSES-NET>                                    6172
<NET-INVESTMENT-INCOME>                           9950
<REALIZED-GAINS-CURRENT>                         63053
<APPREC-INCREASE-CURRENT>                        89271
<NET-CHANGE-FROM-OPS>                           162274
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          950<F1>
<DISTRIBUTIONS-OF-GAINS>                          1743<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1768<F1>
<NUMBER-OF-SHARES-REDEEMED>                        814<F1>
<SHARES-REINVESTED>                                142<F1>
<NET-CHANGE-IN-ASSETS>                          412221
<ACCUMULATED-NII-PRIOR>                             13
<ACCUMULATED-GAINS-PRIOR>                         6440
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4104
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6228
<AVERAGE-NET-ASSETS>                             56785<F1>
<PER-SHARE-NAV-BEGIN>                            17.64<F1>
<PER-SHARE-NII>                                    .31<F1>
<PER-SHARE-GAIN-APPREC>                           4.87<F1>
<PER-SHARE-DIVIDEND>                               .31<F1>
<PER-SHARE-DISTRIBUTIONS>                          .61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.90<F1>
<EXPENSE-RATIO>                                   1.25<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 043
   <NAME> THE ONE GROUP INCOME EQUITY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449883
<INVESTMENTS-AT-VALUE>                          806202
<RECEIVABLES>                                     3268
<ASSETS-OTHER>                                      16
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  809486
<PAYABLE-FOR-SECURITIES>                           511
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1474
<TOTAL-LIABILITIES>                               1985
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        395370
<SHARES-COMMON-STOCK>                             3622<F1>
<SHARES-COMMON-PRIOR>                             1650<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               5
<ACCUMULATED-NET-GAINS>                          55817
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        356319
<NET-ASSETS>                                    807501
<DIVIDEND-INCOME>                                13965
<INTEREST-INCOME>                                 2052
<OTHER-INCOME>                                     105
<EXPENSES-NET>                                    6172
<NET-INVESTMENT-INCOME>                           9950
<REALIZED-GAINS-CURRENT>                         63053
<APPREC-INCREASE-CURRENT>                        89271
<NET-CHANGE-FROM-OPS>                           162274
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          454<F1>
<DISTRIBUTIONS-OF-GAINS>                          1424<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           2112<F1>
<NUMBER-OF-SHARES-REDEEMED>                        242<F1>
<SHARES-REINVESTED>                                102<F1>
<NET-CHANGE-IN-ASSETS>                          412221
<ACCUMULATED-NII-PRIOR>                             13
<ACCUMULATED-GAINS-PRIOR>                         6440
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4104
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6228
<AVERAGE-NET-ASSETS>                             48352<F1>
<PER-SHARE-NAV-BEGIN>                            17.68<F1>
<PER-SHARE-NII>                                    .17<F1>
<PER-SHARE-GAIN-APPREC>                           4.89<F1>
<PER-SHARE-DIVIDEND>                               .18<F1>
<PER-SHARE-DISTRIBUTIONS>                          .61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.95<F1>
<EXPENSE-RATIO>                                   2.00<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 051
   <NAME> THE ONE GROUP INCOME BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           725490
<INVESTMENTS-AT-VALUE>                          749380
<RECEIVABLES>                                    16400
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  765787
<PAYABLE-FOR-SECURITIES>                          5113
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4722
<TOTAL-LIABILITIES>                               9835
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786479
<SHARES-COMMON-STOCK>                            77589<F1>
<SHARES-COMMON-PRIOR>                            55786<F1>
<ACCUMULATED-NII-CURRENT>                          288
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         54705
<ACCUM-APPREC-OR-DEPREC>                         23890
<NET-ASSETS>                                    755952
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                47951
<OTHER-INCOME>                                     138
<EXPENSES-NET>                                    4000
<NET-INVESTMENT-INCOME>                          44089
<REALIZED-GAINS-CURRENT>                         (280)
<APPREC-INCREASE-CURRENT>                         6049
<NET-CHANGE-FROM-OPS>                            49858
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        42737<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          36533<F1>
<NUMBER-OF-SHARES-REDEEMED>                      15133<F1>
<SHARES-REINVESTED>                                403<F1>
<NET-CHANGE-IN-ASSETS>                          219476
<ACCUMULATED-NII-PRIOR>                            396
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                       54533
<GROSS-ADVISORY-FEES>                             3873
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5312
<AVERAGE-NET-ASSETS>                            624092<F1>
<PER-SHARE-NAV-BEGIN>                             9.33<F1>
<PER-SHARE-NII>                                    .64<F1>
<PER-SHARE-GAIN-APPREC>                            .09<F1>
<PER-SHARE-DIVIDEND>                               .64<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.42<F1>
<EXPENSE-RATIO>                                    .60<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 052
   <NAME> THE ONE GROUP INCOME BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           725490
<INVESTMENTS-AT-VALUE>                          749380
<RECEIVABLES>                                    16400
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  765787
<PAYABLE-FOR-SECURITIES>                          5113
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4722
<TOTAL-LIABILITIES>                               9835
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786479
<SHARES-COMMON-STOCK>                             1522<F1>
<SHARES-COMMON-PRIOR>                             1087<F1>
<ACCUMULATED-NII-CURRENT>                          288
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         54705
<ACCUM-APPREC-OR-DEPREC>                         23890
<NET-ASSETS>                                    755952
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                47951
<OTHER-INCOME>                                     138
<EXPENSES-NET>                                    4000
<NET-INVESTMENT-INCOME>                          44089
<REALIZED-GAINS-CURRENT>                         (280)
<APPREC-INCREASE-CURRENT>                         6049
<NET-CHANGE-FROM-OPS>                            49858
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          828<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            814<F1>
<NUMBER-OF-SHARES-REDEEMED>                        448<F1>
<SHARES-REINVESTED>                                 69<F1>
<NET-CHANGE-IN-ASSETS>                          219476
<ACCUMULATED-NII-PRIOR>                            396
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                       54533
<GROSS-ADVISORY-FEES>                             3873
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5312
<AVERAGE-NET-ASSETS>                             12561<F1>
<PER-SHARE-NAV-BEGIN>                             9.32<F1>
<PER-SHARE-NII>                                    .62<F1>
<PER-SHARE-GAIN-APPREC>                            .09<F1>
<PER-SHARE-DIVIDEND>                               .62<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.41<F1>
<EXPENSE-RATIO>                                    .85<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 053
   <NAME> THE ONE GROUP INCOME BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           725490
<INVESTMENTS-AT-VALUE>                          749380
<RECEIVABLES>                                    16400
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  765787
<PAYABLE-FOR-SECURITIES>                          5113
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4722
<TOTAL-LIABILITIES>                               9835
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786479
<SHARES-COMMON-STOCK>                             1145<F1>
<SHARES-COMMON-PRIOR>                              650<F1>
<ACCUMULATED-NII-CURRENT>                          288
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         54705
<ACCUM-APPREC-OR-DEPREC>                         23890
<NET-ASSETS>                                    755952
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                47951
<OTHER-INCOME>                                     138
<EXPENSES-NET>                                    4000
<NET-INVESTMENT-INCOME>                          44089
<REALIZED-GAINS-CURRENT>                         (280)
<APPREC-INCREASE-CURRENT>                         6049
<NET-CHANGE-FROM-OPS>                            49858
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          524<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            628<F1>
<NUMBER-OF-SHARES-REDEEMED>                        169<F1>
<SHARES-REINVESTED>                                 36<F1>
<NET-CHANGE-IN-ASSETS>                          219476
<ACCUMULATED-NII-PRIOR>                            396
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                       54533
<GROSS-ADVISORY-FEES>                             3873
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5312
<AVERAGE-NET-ASSETS>                              8813<F1>
<PER-SHARE-NAV-BEGIN>                             9.40<F1>
<PER-SHARE-NII>                                    .56<F1>
<PER-SHARE-GAIN-APPREC>                            .09<F1>
<PER-SHARE-DIVIDEND>                               .56<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.49<F1>
<EXPENSE-RATIO>                                   1.50<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 061
   <NAME> THE ONE GROUP INTERMEDIATE TAX-FREE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449354
<INVESTMENTS-AT-VALUE>                          465462
<RECEIVABLES>                                     6666
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  472129
<PAYABLE-FOR-SECURITIES>                          7115
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2161
<TOTAL-LIABILITIES>                               9276
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        444793
<SHARES-COMMON-STOCK>                            41315<F1>
<SHARES-COMMON-PRIOR>                            20353<F1>
<ACCUMULATED-NII-CURRENT>                          233
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           1719
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         16108
<NET-ASSETS>                                    462853
<DIVIDEND-INCOME>                                   73
<INTEREST-INCOME>                                18815
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1987
<NET-INVESTMENT-INCOME>                          16901
<REALIZED-GAINS-CURRENT>                          1738
<APPREC-INCREASE-CURRENT>                         5870
<NET-CHANGE-FROM-OPS>                            24509
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        16473<F1>
<DISTRIBUTIONS-OF-GAINS>                           414<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          25961<F1>
<NUMBER-OF-SHARES-REDEEMED>                       5024<F1>
<SHARES-REINVESTED>                                 25<F1>
<NET-CHANGE-IN-ASSETS>                          236591
<ACCUMULATED-NII-PRIOR>                            233
<ACCUMULATED-GAINS-PRIOR>                          410
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2012
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2773
<AVERAGE-NET-ASSETS>                            325966<F1>
<PER-SHARE-NAV-BEGIN>                            10.67<F1>
<PER-SHARE-NII>                                    .54<F1>
<PER-SHARE-GAIN-APPREC>                            .27<F1>
<PER-SHARE-DIVIDEND>                               .54<F1>
<PER-SHARE-DISTRIBUTIONS>                          .02<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.92<F1>
<EXPENSE-RATIO>                                    .58<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 062
   <NAME> THE ONE GROUP INTERMEDIATE TAX-FREE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449354
<INVESTMENTS-AT-VALUE>                          465462
<RECEIVABLES>                                     6666
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  472129
<PAYABLE-FOR-SECURITIES>                          7115
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2161
<TOTAL-LIABILITIES>                               9276
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        444793
<SHARES-COMMON-STOCK>                              775<F1>
<SHARES-COMMON-PRIOR>                              621<F1>
<ACCUMULATED-NII-CURRENT>                          233
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           1719
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         16108
<NET-ASSETS>                                    462853
<DIVIDEND-INCOME>                                   73
<INTEREST-INCOME>                                18815
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1987
<NET-INVESTMENT-INCOME>                          16901
<REALIZED-GAINS-CURRENT>                          1738
<APPREC-INCREASE-CURRENT>                         5870
<NET-CHANGE-FROM-OPS>                            24509
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          322<F1>
<DISTRIBUTIONS-OF-GAINS>                            11<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            272<F1>
<NUMBER-OF-SHARES-REDEEMED>                        141<F1>
<SHARES-REINVESTED>                                 23<F1>
<NET-CHANGE-IN-ASSETS>                          236591
<ACCUMULATED-NII-PRIOR>                            233
<ACCUMULATED-GAINS-PRIOR>                          410
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2012
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2773
<AVERAGE-NET-ASSETS>                              6781<F1>
<PER-SHARE-NAV-BEGIN>                            10.67<F1>
<PER-SHARE-NII>                                    .51<F1>
<PER-SHARE-GAIN-APPREC>                            .26<F1>
<PER-SHARE-DIVIDEND>                               .51<F1>
<PER-SHARE-DISTRIBUTIONS>                          .02<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.91<F1>
<EXPENSE-RATIO>                                    .83<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 063
   <NAME> THE ONE GROUP INTERMEDIATE TAX-FREE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           449354
<INVESTMENTS-AT-VALUE>                          465462
<RECEIVABLES>                                     6666
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  472129
<PAYABLE-FOR-SECURITIES>                          7115
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2161
<TOTAL-LIABILITIES>                               9276
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        444793
<SHARES-COMMON-STOCK>                              303<F1>
<SHARES-COMMON-PRIOR>                              228<F1>
<ACCUMULATED-NII-CURRENT>                          233
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           1719
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         16108
<NET-ASSETS>                                    462853
<DIVIDEND-INCOME>                                   73
<INTEREST-INCOME>                                18815
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1987
<NET-INVESTMENT-INCOME>                          16901
<REALIZED-GAINS-CURRENT>                          1738
<APPREC-INCREASE-CURRENT>                         5870
<NET-CHANGE-FROM-OPS>                            24509
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          106<F1>
<DISTRIBUTIONS-OF-GAINS>                             4<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            153<F1>
<NUMBER-OF-SHARES-REDEEMED>                         87<F1>
<SHARES-REINVESTED>                                  8<F1>
<NET-CHANGE-IN-ASSETS>                          236591
<ACCUMULATED-NII-PRIOR>                            233
<ACCUMULATED-GAINS-PRIOR>                          410
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2012
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2773
<AVERAGE-NET-ASSETS>                              2590<F1>
<PER-SHARE-NAV-BEGIN>                            10.68<F1>
<PER-SHARE-NII>                                    .45<F1>
<PER-SHARE-GAIN-APPREC>                            .27<F1>
<PER-SHARE-DIVIDEND>                               .45<F1>
<PER-SHARE-DISTRIBUTIONS>                          .02<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.93<F1>
<EXPENSE-RATIO>                                   1.47<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 071
   <NAME> THE ONE GROUP DISCIPLINED VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           510158
<INVESTMENTS-AT-VALUE>                          608437
<RECEIVABLES>                                     2391
<ASSETS-OTHER>                                      11
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  610839
<PAYABLE-FOR-SECURITIES>                          2993
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1136
<TOTAL-LIABILITIES>                               4129
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        464962
<SHARES-COMMON-STOCK>                            35922<F1>
<SHARES-COMMON-PRIOR>                            35564<F1>
<ACCUMULATED-NII-CURRENT>                           17
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          43452
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         98279
<NET-ASSETS>                                    606710
<DIVIDEND-INCOME>                                13343
<INTEREST-INCOME>                                  431
<OTHER-INCOME>                                     153
<EXPENSES-NET>                                    5678
<NET-INVESTMENT-INCOME>                           8249
<REALIZED-GAINS-CURRENT>                         59778
<APPREC-INCREASE-CURRENT>                        36525
<NET-CHANGE-FROM-OPS>                           104552
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         7822<F1>
<DISTRIBUTIONS-OF-GAINS>                         53221<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           9945<F1>
<NUMBER-OF-SHARES-REDEEMED>                      11571<F1>
<SHARES-REINVESTED>                               1984<F1>
<NET-CHANGE-IN-ASSETS>                           47093
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        41035
<OVERDISTRIB-NII-PRIOR>                             45
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4129
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5700
<AVERAGE-NET-ASSETS>                            518141<F1>
<PER-SHARE-NAV-BEGIN>                            14.69<F1>
<PER-SHARE-NII>                                    .22<F1>
<PER-SHARE-GAIN-APPREC>                           2.57<F1>
<PER-SHARE-DIVIDEND>                               .22<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              15.65<F1>
<EXPENSE-RATIO>                                    .98<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 072
   <NAME> THE ONE GROUP DISCIPLINED VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           510158
<INVESTMENTS-AT-VALUE>                          608437
<RECEIVABLES>                                     2391
<ASSETS-OTHER>                                      11
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  610839
<PAYABLE-FOR-SECURITIES>                          2993
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1136
<TOTAL-LIABILITIES>                               4129
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        464962
<SHARES-COMMON-STOCK>                             1525<F1>
<SHARES-COMMON-PRIOR>                             1416<F1>
<ACCUMULATED-NII-CURRENT>                           17
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          43452
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         98279
<NET-ASSETS>                                    606710
<DIVIDEND-INCOME>                                13343
<INTEREST-INCOME>                                  431
<OTHER-INCOME>                                     153
<EXPENSES-NET>                                    5678
<NET-INVESTMENT-INCOME>                           8249
<REALIZED-GAINS-CURRENT>                         59778
<APPREC-INCREASE-CURRENT>                        36525
<NET-CHANGE-FROM-OPS>                           104552
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          274<F1>
<DISTRIBUTIONS-OF-GAINS>                          2285<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            559<F1>
<NUMBER-OF-SHARES-REDEEMED>                        628<F1>
<SHARES-REINVESTED>                                178<F1>
<NET-CHANGE-IN-ASSETS>                           47093
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        41035
<OVERDISTRIB-NII-PRIOR>                             45
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4129
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5700
<AVERAGE-NET-ASSETS>                             21908<F1>
<PER-SHARE-NAV-BEGIN>                            14.72<F1>
<PER-SHARE-NII>                                    .19<F1>
<PER-SHARE-GAIN-APPREC>                           2.57<F1>
<PER-SHARE-DIVIDEND>                               .19<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              15.68<F1>
<EXPENSE-RATIO>                                   1.23<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 073
   <NAME> THE ONE GROUP DISCIPLINED VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           510158
<INVESTMENTS-AT-VALUE>                          608437
<RECEIVABLES>                                     2391
<ASSETS-OTHER>                                      11
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  610839
<PAYABLE-FOR-SECURITIES>                          2993
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1136
<TOTAL-LIABILITIES>                               4129
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        464962
<SHARES-COMMON-STOCK>                             1310<F1>
<SHARES-COMMON-PRIOR>                             1110<F1>
<ACCUMULATED-NII-CURRENT>                           17
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          43452
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         98279
<NET-ASSETS>                                    606710
<DIVIDEND-INCOME>                                13343
<INTEREST-INCOME>                                  431
<OTHER-INCOME>                                     153
<EXPENSES-NET>                                    5678
<NET-INVESTMENT-INCOME>                           8249
<REALIZED-GAINS-CURRENT>                         59778
<APPREC-INCREASE-CURRENT>                        36525
<NET-CHANGE-FROM-OPS>                           104552
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           89<F1>
<DISTRIBUTIONS-OF-GAINS>                          1855<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            219<F1>
<NUMBER-OF-SHARES-REDEEMED>                        156<F1>
<SHARES-REINVESTED>                                137<F1>
<NET-CHANGE-IN-ASSETS>                           47093
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        41035
<OVERDISTRIB-NII-PRIOR>                             45
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4129
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5700
<AVERAGE-NET-ASSETS>                             17995<F1>
<PER-SHARE-NAV-BEGIN>                            14.69<F1>
<PER-SHARE-NII>                                    .08<F1>
<PER-SHARE-GAIN-APPREC>                           2.55<F1>
<PER-SHARE-DIVIDEND>                               .07<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.61<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              15.64<F1>
<EXPENSE-RATIO>                                   1.98<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 081
   <NAME> THE ONE GROUP GROWTH OPPORTUNITIES FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           611514
<INVESTMENTS-AT-VALUE>                          707039
<RECEIVABLES>                                     4165
<ASSETS-OTHER>                                      21
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711225
<PAYABLE-FOR-SECURITIES>                          5891
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          644
<TOTAL-LIABILITIES>                               6535
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        584715
<SHARES-COMMON-STOCK>                            32061<F1>
<SHARES-COMMON-PRIOR>                            28310<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          24450
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         95525
<NET-ASSETS>                                    704690
<DIVIDEND-INCOME>                                11811
<INTEREST-INCOME>                                 1507
<OTHER-INCOME>                                     668
<EXPENSES-NET>                                    6357
<NET-INVESTMENT-INCOME>                           7629
<REALIZED-GAINS-CURRENT>                         35797
<APPREC-INCREASE-CURRENT>                        87369
<NET-CHANGE-FROM-OPS>                           130795
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         7722<F1>
<DISTRIBUTIONS-OF-GAINS>                         83581<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          11966<F1>
<NUMBER-OF-SHARES-REDEEMED>                      11005<F1>
<SHARES-REINVESTED>                               2790<F1>
<NET-CHANGE-IN-ASSETS>                          131203
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        80677
<OVERDISTRIB-NII-PRIOR>                             47
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4511
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6389
<AVERAGE-NET-ASSETS>                            554708<F1>
<PER-SHARE-NAV-BEGIN>                            18.81<F1>
<PER-SHARE-NII>                                    .25<F1>
<PER-SHARE-GAIN-APPREC>                           3.59<F1>
<PER-SHARE-DIVIDEND>                               .25<F1>
<PER-SHARE-DISTRIBUTIONS>                         2.92<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              19.46<F1>
<EXPENSE-RATIO>                                    .99<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 082
   <NAME> THE ONE GROUP GROWTH OPPORTUNITIES FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           611514
<INVESTMENTS-AT-VALUE>                          707039
<RECEIVABLES>                                     4165
<ASSETS-OTHER>                                      21
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711225
<PAYABLE-FOR-SECURITIES>                          5891
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          644
<TOTAL-LIABILITIES>                               6535
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        584715
<SHARES-COMMON-STOCK>                             2239<F1>
<SHARES-COMMON-PRIOR>                             1495<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          24450
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         95525
<NET-ASSETS>                                    704690
<DIVIDEND-INCOME>                                11811
<INTEREST-INCOME>                                 1507
<OTHER-INCOME>                                     668
<EXPENSES-NET>                                    6357
<NET-INVESTMENT-INCOME>                           7629
<REALIZED-GAINS-CURRENT>                         35797
<APPREC-INCREASE-CURRENT>                        87369
<NET-CHANGE-FROM-OPS>                           130795
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          395<F1>
<DISTRIBUTIONS-OF-GAINS>                          4572<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           2954<F1>
<NUMBER-OF-SHARES-REDEEMED>                       2503<F1>
<SHARES-REINVESTED>                                293<F1>
<NET-CHANGE-IN-ASSETS>                          131203
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        80677
<OVERDISTRIB-NII-PRIOR>                             47
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4511
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6389
<AVERAGE-NET-ASSETS>                             32282<F1>
<PER-SHARE-NAV-BEGIN>                            18.76<F1>
<PER-SHARE-NII>                                    .21<F1>
<PER-SHARE-GAIN-APPREC>                           3.58<F1>
<PER-SHARE-DIVIDEND>                               .24<F1>
<PER-SHARE-DISTRIBUTIONS>                         2.92<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              19.37<F1>
<EXPENSE-RATIO>                                   1.25<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 083
   <NAME> THE ONE GROUP GROWTH OPPORTUNITIES FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           611514
<INVESTMENTS-AT-VALUE>                          707039
<RECEIVABLES>                                     4165
<ASSETS-OTHER>                                      21
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711225
<PAYABLE-FOR-SECURITIES>                          5891
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          644
<TOTAL-LIABILITIES>                               6535
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        584715
<SHARES-COMMON-STOCK>                             1988<F1>
<SHARES-COMMON-PRIOR>                              701<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          24450
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         95525
<NET-ASSETS>                                    704690
<DIVIDEND-INCOME>                                11811
<INTEREST-INCOME>                                 1507
<OTHER-INCOME>                                     668
<EXPENSES-NET>                                    6357
<NET-INVESTMENT-INCOME>                           7629
<REALIZED-GAINS-CURRENT>                         35797
<APPREC-INCREASE-CURRENT>                        87369
<NET-CHANGE-FROM-OPS>                           130795
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          235<F1>
<DISTRIBUTIONS-OF-GAINS>                          3102<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1212<F1>
<NUMBER-OF-SHARES-REDEEMED>                        125<F1>
<SHARES-REINVESTED>                                200<F1>
<NET-CHANGE-IN-ASSETS>                          131203
<ACCUMULATED-NII-PRIOR>                              0 
<ACCUMULATED-GAINS-PRIOR>                        80677
<OVERDISTRIB-NII-PRIOR>                             47
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4511
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6389
<AVERAGE-NET-ASSETS>                             22627<F1>
<PER-SHARE-NAV-BEGIN>                            18.43<F1>
<PER-SHARE-NII>                                    .11<F1>
<PER-SHARE-GAIN-APPREC>                           3.44<F1>
<PER-SHARE-DIVIDEND>                               .22<F1>
<PER-SHARE-DISTRIBUTIONS>                         2.92<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              18.82<F1>
<EXPENSE-RATIO>                                   2.00<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 101
   <NAME> THE ONE GROUP LIMITED VOLATILITY BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581508
<INVESTMENTS-AT-VALUE>                          585955
<RECEIVABLES>                                     6300
<ASSETS-OTHER>                                      12
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  592267
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3313
<TOTAL-LIABILITIES>                               3313
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        594304
<SHARES-COMMON-STOCK>                            53876<F1>
<SHARES-COMMON-PRIOR>                             2050<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             121
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          9676
<ACCUM-APPREC-OR-DEPREC>                          4447
<NET-ASSETS>                                    588954
<DIVIDEND-INCOME>                                   32
<INTEREST-INCOME>                                39891
<OTHER-INCOME>                                     187
<EXPENSES-NET>                                    3223
<NET-INVESTMENT-INCOME>                          36887
<REALIZED-GAINS-CURRENT>                        (2851)
<APPREC-INCREASE-CURRENT>                         5502
<NET-CHANGE-FROM-OPS>                            39538
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        35406<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          10686<F1>
<NUMBER-OF-SHARES-REDEEMED>                      15059<F1>
<SHARES-REINVESTED>                                206<F1>
<NET-CHANGE-IN-ASSETS>                         (42228)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            121
<OVERDIST-NET-GAINS-PRIOR>                        6825
<GROSS-ADVISORY-FEES>                             3660
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5090
<AVERAGE-NET-ASSETS>                            584071<F1>
<PER-SHARE-NAV-BEGIN>                            10.42<F1>
<PER-SHARE-NII>                                    .63<F1>
<PER-SHARE-GAIN-APPREC>                            .05<F1>
<PER-SHARE-DIVIDEND>                               .63<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.47<F1>
<EXPENSE-RATIO>                                    .51<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 102
   <NAME> THE ONE GROUP LIMITED VOLATILITY BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581508
<INVESTMENTS-AT-VALUE>                          585955
<RECEIVABLES>                                     6300
<ASSETS-OTHER>                                      12
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  592267
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3313
<TOTAL-LIABILITIES>                               3313
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        594304
<SHARES-COMMON-STOCK>                             1918<F1>
<SHARES-COMMON-PRIOR>                             2050<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             121
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          9676
<ACCUM-APPREC-OR-DEPREC>                          4447
<NET-ASSETS>                                    588954
<DIVIDEND-INCOME>                                   32
<INTEREST-INCOME>                                39891
<OTHER-INCOME>                                     187
<EXPENSES-NET>                                    3223
<NET-INVESTMENT-INCOME>                          36887
<REALIZED-GAINS-CURRENT>                        (2851)
<APPREC-INCREASE-CURRENT>                         5502
<NET-CHANGE-FROM-OPS>                            39538
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1219<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            482<F1>
<NUMBER-OF-SHARES-REDEEMED>                        697<F1>
<SHARES-REINVESTED>                                 83<F1>
<NET-CHANGE-IN-ASSETS>                         (42228)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            121
<OVERDIST-NET-GAINS-PRIOR>                        6825
<GROSS-ADVISORY-FEES>                             3660
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5090
<AVERAGE-NET-ASSETS>                             20967<F1>
<PER-SHARE-NAV-BEGIN>                            10.41<F1>
<PER-SHARE-NII>                                    .61<F1>
<PER-SHARE-GAIN-APPREC>                            .05<F1>
<PER-SHARE-DIVIDEND>                               .61<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.46<F1>
<EXPENSE-RATIO>                                    .76<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 103
   <NAME> THE ONE GROUP LIMITED VOLATILITY BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581508
<INVESTMENTS-AT-VALUE>                          585955
<RECEIVABLES>                                     6300
<ASSETS-OTHER>                                      12
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  592267
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3313
<TOTAL-LIABILITIES>                               3313
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        594304
<SHARES-COMMON-STOCK>                              466<F1>
<SHARES-COMMON-PRIOR>                              469<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             121
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          9676
<ACCUM-APPREC-OR-DEPREC>                          4447
<NET-ASSETS>                                    588954
<DIVIDEND-INCOME>                                   32
<INTEREST-INCOME>                                39891
<OTHER-INCOME>                                     187
<EXPENSES-NET>                                    3223
<NET-INVESTMENT-INCOME>                          36887
<REALIZED-GAINS-CURRENT>                        (2851)
<APPREC-INCREASE-CURRENT>                         5502
<NET-CHANGE-FROM-OPS>                            39538
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          262<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             85<F1>
<NUMBER-OF-SHARES-REDEEMED>                        110<F1>
<SHARES-REINVESTED>                                 22<F1>
<NET-CHANGE-IN-ASSETS>                         (42228)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            121
<OVERDIST-NET-GAINS-PRIOR>                        6825
<GROSS-ADVISORY-FEES>                             3660
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5090
<AVERAGE-NET-ASSETS>                              5030<F1>
<PER-SHARE-NAV-BEGIN>                            10.49<F1>
<PER-SHARE-NII>                                    .55<F1>
<PER-SHARE-GAIN-APPREC>                            .04<F1>
<PER-SHARE-DIVIDEND>                               .55<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.53<F1>
<EXPENSE-RATIO>                                   1.20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 111
   <NAME> THE ONE GROUP EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           518526
<INVESTMENTS-AT-VALUE>                          745879
<RECEIVABLES>                                     3488
<ASSETS-OTHER>                                      14
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  749381
<PAYABLE-FOR-SECURITIES>                           485
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1040
<TOTAL-LIABILITIES>                               1525
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        502010
<SHARES-COMMON-STOCK>                            22055<F1>
<SHARES-COMMON-PRIOR>                            19269<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          18873
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        226973
<NET-ASSETS>                                    747856
<DIVIDEND-INCOME>                                10484
<INTEREST-INCOME>                                 1218
<OTHER-INCOME>                                     103
<EXPENSES-NET>                                    2675
<NET-INVESTMENT-INCOME>                           9130
<REALIZED-GAINS-CURRENT>                         20871
<APPREC-INCREASE-CURRENT>                       140765
<NET-CHANGE-FROM-OPS>                           170766
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         7178<F1>
<DISTRIBUTIONS-OF-GAINS>                          3288<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          10607<F1>
<NUMBER-OF-SHARES-REDEEMED>                       8036<F1>
<SHARES-REINVESTED>                                215<F1>
<NET-CHANGE-IN-ASSETS>                          356074
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         2450
<OVERDISTRIB-NII-PRIOR>                            405 
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1642
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   4402
<AVERAGE-NET-ASSETS>                            398902<F1>
<PER-SHARE-NAV-BEGIN>                            16.66<F1>
<PER-SHARE-NII>                                    .35<F1>
<PER-SHARE-GAIN-APPREC>                           5.27<F1>
<PER-SHARE-DIVIDEND>                               .33<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.80<F1>
<EXPENSE-RATIO>                                    .30<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 112
   <NAME> THE ONE GROUP EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           518526
<INVESTMENTS-AT-VALUE>                          745879
<RECEIVABLES>                                     3488
<ASSETS-OTHER>                                      14
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  749381
<PAYABLE-FOR-SECURITIES>                           485
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1040
<TOTAL-LIABILITIES>                               1525
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        502010
<SHARES-COMMON-STOCK>                            4510<F1>
<SHARES-COMMON-PRIOR>                            1931<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          18873
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        226973
<NET-ASSETS>                                    747856
<DIVIDEND-INCOME>                                10484
<INTEREST-INCOME>                                 1218
<OTHER-INCOME>                                     103
<EXPENSES-NET>                                    2675
<NET-INVESTMENT-INCOME>                           9130
<REALIZED-GAINS-CURRENT>                         20871
<APPREC-INCREASE-CURRENT>                       140765
<NET-CHANGE-FROM-OPS>                           170766
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          899<F1>
<DISTRIBUTIONS-OF-GAINS>                           420<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           3962<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1452<F1>
<SHARES-REINVESTED>                                 69<F1>
<NET-CHANGE-IN-ASSETS>                          356074
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         2450
<OVERDISTRIB-NII-PRIOR>                            405
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1642
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   4402
<AVERAGE-NET-ASSETS>                             58149<F1>
<PER-SHARE-NAV-BEGIN>                            16.67<F1>
<PER-SHARE-NII>                                    .29<F1>
<PER-SHARE-GAIN-APPREC>                           5.28<F1>
<PER-SHARE-DIVIDEND>                               .28<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.81<F1>
<EXPENSE-RATIO>                                    .55<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 113
   <NAME> THE ONE GROUP EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           518526
<INVESTMENTS-AT-VALUE>                          745879
<RECEIVABLES>                                     3488
<ASSETS-OTHER>                                      14
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  749381
<PAYABLE-FOR-SECURITIES>                           485
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1040
<TOTAL-LIABILITIES>                               1525
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        502010
<SHARES-COMMON-STOCK>                             7737<F1>
<SHARES-COMMON-PRIOR>                             2310<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          18873
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        226973
<NET-ASSETS>                                    747856
<DIVIDEND-INCOME>                                10484
<INTEREST-INCOME>                                 1218
<OTHER-INCOME>                                     103
<EXPENSES-NET>                                    2675
<NET-INVESTMENT-INCOME>                           9130
<REALIZED-GAINS-CURRENT>                         20871
<APPREC-INCREASE-CURRENT>                       140765
<NET-CHANGE-FROM-OPS>                           170766
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          780<F1>
<DISTRIBUTIONS-OF-GAINS>                           629<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           5693<F1>
<NUMBER-OF-SHARES-REDEEMED>                        342<F1>
<SHARES-REINVESTED>                                 76<F1>
<NET-CHANGE-IN-ASSETS>                          356074
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         2450
<OVERDISTRIB-NII-PRIOR>                            405
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             1642
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   4402
<AVERAGE-NET-ASSETS>                             90188<F1>
<PER-SHARE-NAV-BEGIN>                            16.68<F1>
<PER-SHARE-NII>                                    .16<F1>
<PER-SHARE-GAIN-APPREC>                           5.27<F1>
<PER-SHARE-DIVIDEND>                               .16<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              21.80<F1>
<EXPENSE-RATIO>                                   1.30<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 121
   <NAME> THE ONE GROUP LARGE COMPANY VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581154
<INVESTMENTS-AT-VALUE>                          710397
<RECEIVABLES>                                      869
<ASSETS-OTHER>                                      10
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711276
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1000
<TOTAL-LIABILITIES>                               1000
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        565003
<SHARES-COMMON-STOCK>                            46382<F1>
<SHARES-COMMON-PRIOR>                            45543<F1>
<ACCUMULATED-NII-CURRENT>                            1
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          16029
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        129243
<NET-ASSETS>                                    710276
<DIVIDEND-INCOME>                                17030
<INTEREST-INCOME>                                 1683
<OTHER-INCOME>                                     183
<EXPENSES-NET>                                    6269
<NET-INVESTMENT-INCOME>                          12627
<REALIZED-GAINS-CURRENT>                         17493
<APPREC-INCREASE-CURRENT>                       126134
<NET-CHANGE-FROM-OPS>                           156254
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        12228<F1>
<DISTRIBUTIONS-OF-GAINS>                         47388<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          16174<F1>
<NUMBER-OF-SHARES-REDEEMED>                      17266<F1>
<SHARES-REINVESTED>                               1931<F1>
<NET-CHANGE-IN-ASSETS>                          112234
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        47238
<OVERDISTRIB-NII-PRIOR>                            114
<OVERDIST-NET-GAINS-PRIOR>                           0 
<GROSS-ADVISORY-FEES>                             4726
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6281
<AVERAGE-NET-ASSETS>                            620639<F1>
<PER-SHARE-NAV-BEGIN>                            12.83<F1>
<PER-SHARE-NII>                                    .27<F1>
<PER-SHARE-GAIN-APPREC>                           3.01<F1>
<PER-SHARE-DIVIDEND>                               .26<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.06<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              14.79<F1>
<EXPENSE-RATIO>                                    .97<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 122
   <NAME> THE ONE GROUP LARGE COMPANY VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581154
<INVESTMENTS-AT-VALUE>                          710397
<RECEIVABLES>                                      869
<ASSETS-OTHER>                                      10
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711276
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1000
<TOTAL-LIABILITIES>                               1000
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        565003
<SHARES-COMMON-STOCK>                              999<F1>
<SHARES-COMMON-PRIOR>                              729<F1>
<ACCUMULATED-NII-CURRENT>                            1
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          16029
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        129243
<NET-ASSETS>                                    710276
<DIVIDEND-INCOME>                                17030
<INTEREST-INCOME>                                 1683
<OTHER-INCOME>                                     183
<EXPENSES-NET>                                    6269
<NET-INVESTMENT-INCOME>                          12627
<REALIZED-GAINS-CURRENT>                         17493
<APPREC-INCREASE-CURRENT>                       126134
<NET-CHANGE-FROM-OPS>                           156254
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          209<F1>
<DISTRIBUTIONS-OF-GAINS>                           904<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            793<F1>
<NUMBER-OF-SHARES-REDEEMED>                        607<F1>
<SHARES-REINVESTED>                                 84<F1>
<NET-CHANGE-IN-ASSETS>                          112234
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        47238
<OVERDISTRIB-NII-PRIOR>                            114
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4726
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6281
<AVERAGE-NET-ASSETS>                             12025<F1>
<PER-SHARE-NAV-BEGIN>                            12.87<F1>
<PER-SHARE-NII>                                    .23<F1>
<PER-SHARE-GAIN-APPREC>                           3.04<F1>
<PER-SHARE-DIVIDEND>                               .23<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.06<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              14.85<F1>
<EXPENSE-RATIO>                                   1.22<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 123
   <NAME> THE ONE GROUP LARGE COMPANY VALUE FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           581154
<INVESTMENTS-AT-VALUE>                          710397
<RECEIVABLES>                                      869
<ASSETS-OTHER>                                      10
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  711276
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1000
<TOTAL-LIABILITIES>                               1000
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        565003
<SHARES-COMMON-STOCK>                              621<F1>
<SHARES-COMMON-PRIOR>                              318<F1>
<ACCUMULATED-NII-CURRENT>                            1
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          16029
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        129243
<NET-ASSETS>                                    710276
<DIVIDEND-INCOME>                                17030
<INTEREST-INCOME>                                 1683
<OTHER-INCOME>                                     183
<EXPENSES-NET>                                    6269
<NET-INVESTMENT-INCOME>                          12627
<REALIZED-GAINS-CURRENT>                         17493
<APPREC-INCREASE-CURRENT>                       126134
<NET-CHANGE-FROM-OPS>                           156254
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           69<F1>
<DISTRIBUTIONS-OF-GAINS>                           410<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            317<F1>
<NUMBER-OF-SHARES-REDEEMED>                         50<F1>
<SHARES-REINVESTED>                                 36<F1>
<NET-CHANGE-IN-ASSETS>                          112234
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        47238
<OVERDISTRIB-NII-PRIOR>                            114
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             4726
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   6281
<AVERAGE-NET-ASSETS>                              6040<F1>
<PER-SHARE-NAV-BEGIN>                            12.98<F1>
<PER-SHARE-NII>                                    .14<F1>
<PER-SHARE-GAIN-APPREC>                           3.04<F1>
<PER-SHARE-DIVIDEND>                               .15<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.06<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              14.95<F1>
<EXPENSE-RATIO>                                   1.97<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 131
   <NAME> THE ONE GROUP OHIO MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153990
<INVESTMENTS-AT-VALUE>                          163485
<RECEIVABLES>                                     1797
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165282
<PAYABLE-FOR-SECURITIES>                           820
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          860
<TOTAL-LIABILITIES>                               1680
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        158243
<SHARES-COMMON-STOCK>                            12245<F1>
<SHARES-COMMON-PRIOR>                             7540<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4141
<ACCUM-APPREC-OR-DEPREC>                          9495
<NET-ASSETS>                                    163602
<DIVIDEND-INCOME>                                  120
<INTEREST-INCOME>                                 7389
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     848
<NET-INVESTMENT-INCOME>                           6661
<REALIZED-GAINS-CURRENT>                         (175)
<APPREC-INCREASE-CURRENT>                         2389
<NET-CHANGE-FROM-OPS>                             8875
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         5336<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           6252<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1556<F1>
<SHARES-REINVESTED>                                  9<F1>
<NET-CHANGE-IN-ASSETS>                           57630
<ACCUMULATED-NII-PRIOR>                              8
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        3966
<GROSS-ADVISORY-FEES>                              781
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1270
<AVERAGE-NET-ASSETS>                            101911<F1>
<PER-SHARE-NAV-BEGIN>                            10.69<F1>
<PER-SHARE-NII>                                    .56<F1>
<PER-SHARE-GAIN-APPREC>                            .19<F1>
<PER-SHARE-DIVIDEND>                               .56<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.88<F1>
<EXPENSE-RATIO>                                    .54<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 132
   <NAME> THE ONE GROUP OHIO MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153990
<INVESTMENTS-AT-VALUE>                          163485
<RECEIVABLES>                                     1797
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165282
<PAYABLE-FOR-SECURITIES>                           820
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          860
<TOTAL-LIABILITIES>                               1680
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        158243
<SHARES-COMMON-STOCK>                             1478<F1>
<SHARES-COMMON-PRIOR>                             1540<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4141
<ACCUM-APPREC-OR-DEPREC>                          9495
<NET-ASSETS>                                    163602
<DIVIDEND-INCOME>                                  120
<INTEREST-INCOME>                                 7389
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     848
<NET-INVESTMENT-INCOME>                           6661
<REALIZED-GAINS-CURRENT>                         (175)
<APPREC-INCREASE-CURRENT>                         2389
<NET-CHANGE-FROM-OPS>                             8875
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          810<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            464<F1>
<NUMBER-OF-SHARES-REDEEMED>                        588<F1>
<SHARES-REINVESTED>                                 62<F1>
<NET-CHANGE-IN-ASSETS>                           57630
<ACCUMULATED-NII-PRIOR>                              8
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        3966
<GROSS-ADVISORY-FEES>                              781
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1270
<AVERAGE-NET-ASSETS>                             16322<F1>
<PER-SHARE-NAV-BEGIN>                            10.72<F1>
<PER-SHARE-NII>                                    .54<F1>
<PER-SHARE-GAIN-APPREC>                            .19<F1>
<PER-SHARE-DIVIDEND>                               .54<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.91<F1>
<EXPENSE-RATIO>                                    .79<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 133
   <NAME> THE ONE GROUP OHIO MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153990
<INVESTMENTS-AT-VALUE>                          163485
<RECEIVABLES>                                     1797
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165282
<PAYABLE-FOR-SECURITIES>                           820
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          860
<TOTAL-LIABILITIES>                               1680
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        158243
<SHARES-COMMON-STOCK>                             1304<F1>
<SHARES-COMMON-PRIOR>                              820<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4141
<ACCUM-APPREC-OR-DEPREC>                          9495
<NET-ASSETS>                                    163602
<DIVIDEND-INCOME>                                  120
<INTEREST-INCOME>                                 7389
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     848
<NET-INVESTMENT-INCOME>                           6661
<REALIZED-GAINS-CURRENT>                         (175)
<APPREC-INCREASE-CURRENT>                         2389
<NET-CHANGE-FROM-OPS>                             8875
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          515<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            592<F1>
<NUMBER-OF-SHARES-REDEEMED>                        145<F1>
<SHARES-REINVESTED>                                 36<F1>
<NET-CHANGE-IN-ASSETS>                           57630
<ACCUMULATED-NII-PRIOR>                              8
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        3966
<GROSS-ADVISORY-FEES>                              781
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1270
<AVERAGE-NET-ASSETS>                             11897<F1>
<PER-SHARE-NAV-BEGIN>                            10.79<F1>
<PER-SHARE-NII>                                    .47<F1>
<PER-SHARE-GAIN-APPREC>                            .19<F1>
<PER-SHARE-DIVIDEND>                               .47<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.98<F1>
<EXPENSE-RATIO>                                   1.44<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 141
   <NAME> THE ONE GROUP INTERNATIONAL EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           384664
<INVESTMENTS-AT-VALUE>                          475428
<RECEIVABLES>                                     1786
<ASSETS-OTHER>                                     396
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  477610
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         5066
<TOTAL-LIABILITIES>                               5066
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380858
<SHARES-COMMON-STOCK>                            26634<F1>
<SHARES-COMMON-PRIOR>                            22921<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            2608
<ACCUMULATED-NET-GAINS>                           3571
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         90723
<NET-ASSETS>                                    472544
<DIVIDEND-INCOME>                                 8560
<INTEREST-INCOME>                                  416
<OTHER-INCOME>                                   (960)
<EXPENSES-NET>                                    3531
<NET-INVESTMENT-INCOME>                           4485
<REALIZED-GAINS-CURRENT>                          5054
<APPREC-INCREASE-CURRENT>                        51395
<NET-CHANGE-FROM-OPS>                            60934
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         7763<F1>
<DISTRIBUTIONS-OF-GAINS>                          3811<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          12143<F1>
<NUMBER-OF-SHARES-REDEEMED>                       8601<F1>
<SHARES-REINVESTED>                                171<F1>
<NET-CHANGE-IN-ASSETS>                          108109
<ACCUMULATED-NII-PRIOR>                           1395
<ACCUMULATED-GAINS-PRIOR>                         1893
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2202
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3542
<AVERAGE-NET-ASSETS>                            381940<F1>
<PER-SHARE-NAV-BEGIN>                            15.17<F1>
<PER-SHARE-NII>                                    .15<F1>
<PER-SHARE-GAIN-APPREC>                           2.02<F1>
<PER-SHARE-DIVIDEND>                               .30<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              16.89<F1>
<EXPENSE-RATIO>                                    .86<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 142
   <NAME> THE ONE GROUP INTERNATIONAL EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           384664
<INVESTMENTS-AT-VALUE>                          475428
<RECEIVABLES>                                     1786
<ASSETS-OTHER>                                     396
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  477610
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         5066
<TOTAL-LIABILITIES>                               5066
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380858
<SHARES-COMMON-STOCK>                              743<F1>
<SHARES-COMMON-PRIOR>                              712<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            2608
<ACCUMULATED-NET-GAINS>                           3571
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         90723
<NET-ASSETS>                                    472544
<DIVIDEND-INCOME>                                 8560
<INTEREST-INCOME>                                  416
<OTHER-INCOME>                                   (960)
<EXPENSES-NET>                                    3531
<NET-INVESTMENT-INCOME>                           4485
<REALIZED-GAINS-CURRENT>                          5054
<APPREC-INCREASE-CURRENT>                        51395
<NET-CHANGE-FROM-OPS>                            60934
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          165<F1>
<DISTRIBUTIONS-OF-GAINS>                           111<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            337<F1>
<NUMBER-OF-SHARES-REDEEMED>                        317<F1>
<SHARES-REINVESTED>                                 11<F1>
<NET-CHANGE-IN-ASSETS>                          108109
<ACCUMULATED-NII-PRIOR>                           1395
<ACCUMULATED-GAINS-PRIOR>                         1893
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2202
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3542
<AVERAGE-NET-ASSETS>                             10858<F1>
<PER-SHARE-NAV-BEGIN>                            15.16<F1>
<PER-SHARE-NII>                                    .11<F1>
<PER-SHARE-GAIN-APPREC>                           2.03<F1>
<PER-SHARE-DIVIDEND>                               .23<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              16.92<F1>
<EXPENSE-RATIO>                                   1.11<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 143
   <NAME> THE ONE GROUP INTERNATIONAL EQUITY INDEX FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           384664
<INVESTMENTS-AT-VALUE>                          475428
<RECEIVABLES>                                     1786
<ASSETS-OTHER>                                     396
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  477610
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         5066
<TOTAL-LIABILITIES>                               5066
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380858
<SHARES-COMMON-STOCK>                              610<F1>
<SHARES-COMMON-PRIOR>                              396<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            2608
<ACCUMULATED-NET-GAINS>                           3571
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         90723
<NET-ASSETS>                                    472544
<DIVIDEND-INCOME>                                 8560
<INTEREST-INCOME>                                  416
<OTHER-INCOME>                                   (960)
<EXPENSES-NET>                                    3531
<NET-INVESTMENT-INCOME>                           4485
<REALIZED-GAINS-CURRENT>                          5054
<APPREC-INCREASE-CURRENT>                        51395
<NET-CHANGE-FROM-OPS>                            60934
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           84<F1>
<DISTRIBUTIONS-OF-GAINS>                            72<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            297<F1>
<NUMBER-OF-SHARES-REDEEMED>                         90<F1>
<SHARES-REINVESTED>                                  7<F1>
<NET-CHANGE-IN-ASSETS>                          108109
<ACCUMULATED-NII-PRIOR>                           1395
<ACCUMULATED-GAINS-PRIOR>                         1893
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2202
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3542
<AVERAGE-NET-ASSETS>                              7344<F1>
<PER-SHARE-NAV-BEGIN>                            14.79<F1>
<PER-SHARE-NII>                                    .09<F1>
<PER-SHARE-GAIN-APPREC>                           1.86<F1>
<PER-SHARE-DIVIDEND>                               .15<F1>
<PER-SHARE-DISTRIBUTIONS>                          .15<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              16.44<F1>
<EXPENSE-RATIO>                                   1.86<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 151
   <NAME> THE ONE GROUP TREASURY ONLY MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           473852
<INVESTMENTS-AT-VALUE>                          473852
<RECEIVABLES>                                     9211
<ASSETS-OTHER>                                      77
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  483140
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2280
<TOTAL-LIABILITIES>                               2280
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        480952
<SHARES-COMMON-STOCK>                           480950
<SHARES-COMMON-PRIOR>                           416037
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                              92
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                    480860
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                25226
<OTHER-INCOME>                                     145
<EXPENSES-NET>                                     742
<NET-INVESTMENT-INCOME>                          24629
<REALIZED-GAINS-CURRENT>                          (16)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            24613
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        24629
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        1603666
<NUMBER-OF-SHARES-REDEEMED>                    1542160
<SHARES-REINVESTED>                               3409
<NET-CHANGE-IN-ASSETS>                           64899
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          76
<GROSS-ADVISORY-FEES>                              385
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    742
<AVERAGE-NET-ASSETS>                            481266
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   .051
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                              .051
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                    .15
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 161
   <NAME> THE ONE GROUP GOVERNMENT MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                          1083989
<INVESTMENTS-AT-VALUE>                         1083989
<RECEIVABLES>                                     4723
<ASSETS-OTHER>                                     143
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1088855
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         5417
<TOTAL-LIABILITIES>                               5417
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1083623
<SHARES-COMMON-STOCK>                          1083623
<SHARES-COMMON-PRIOR>                           855679
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                           185
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   1083438
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                57712
<OTHER-INCOME>                                      13
<EXPENSES-NET>                                    1437
<NET-INVESTMENT-INCOME>                          56288
<REALIZED-GAINS-CURRENT>                         (119)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                            56169
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        56288
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        4075935
<NUMBER-OF-SHARES-REDEEMED>                    3859366
<SHARES-REINVESTED>                              11375
<NET-CHANGE-IN-ASSETS>                          227825
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                          66
<GROSS-ADVISORY-FEES>                              849
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1437
<AVERAGE-NET-ASSETS>                           1060674
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   .053
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                              .053
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                    .14
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 171
   <NAME> THE ONE GROUP ASSET ALLOCATION FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153456
<INVESTMENTS-AT-VALUE>                          170647
<RECEIVABLES>                                     2706
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  173360
<PAYABLE-FOR-SECURITIES>                          2482
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          628
<TOTAL-LIABILITIES>                               3110
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        139176
<SHARES-COMMON-STOCK>                             7314<F1>
<SHARES-COMMON-PRIOR>                             4299<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          13861
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         17208
<NET-ASSETS>                                    170250
<DIVIDEND-INCOME>                                 1169
<INTEREST-INCOME>                                 4334
<OTHER-INCOME>                                      35
<EXPENSES-NET>                                    1365
<NET-INVESTMENT-INCOME>                           4173
<REALIZED-GAINS-CURRENT>                         15867
<APPREC-INCREASE-CURRENT>                         4463
<NET-CHANGE-FROM-OPS>                            24503
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2689<F1>
<DISTRIBUTIONS-OF-GAINS>                          2959<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           6079<F1>
<NUMBER-OF-SHARES-REDEEMED>                       3348<F1>
<SHARES-REINVESTED>                                284<F1>
<NET-CHANGE-IN-ASSETS>                           83503
<ACCUMULATED-NII-PRIOR>                             19
<ACCUMULATED-GAINS-PRIOR>                         3058
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              827
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1647
<AVERAGE-NET-ASSETS>                             75843<F1>
<PER-SHARE-NAV-BEGIN>                            11.71<F1>
<PER-SHARE-NII>                                    .43<F1>
<PER-SHARE-GAIN-APPREC>                           1.81<F1>
<PER-SHARE-DIVIDEND>                               .43<F1>
<PER-SHARE-DISTRIBUTIONS>                          .54<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              12.98<F1>
<EXPENSE-RATIO>                                    .80<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 172
   <NAME> THE ONE GROUP ASSET ALLOCATION FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153456
<INVESTMENTS-AT-VALUE>                          170647
<RECEIVABLES>                                     2706
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  173360
<PAYABLE-FOR-SECURITIES>                          2482
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          628
<TOTAL-LIABILITIES>                               3110
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        139176
<SHARES-COMMON-STOCK>                             2414<F1>
<SHARES-COMMON-PRIOR>                             1523<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          13861
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         17208
<NET-ASSETS>                                    170250
<DIVIDEND-INCOME>                                 1169
<INTEREST-INCOME>                                 4334
<OTHER-INCOME>                                      35
<EXPENSES-NET>                                    1365
<NET-INVESTMENT-INCOME>                           4173
<REALIZED-GAINS-CURRENT>                         15867
<APPREC-INCREASE-CURRENT>                         4463
<NET-CHANGE-FROM-OPS>                            24503
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          767<F1>
<DISTRIBUTIONS-OF-GAINS>                           974<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1212<F1>
<NUMBER-OF-SHARES-REDEEMED>                        460<F1>
<SHARES-REINVESTED>                                139<F1>
<NET-CHANGE-IN-ASSETS>                           83503
<ACCUMULATED-NII-PRIOR>                             19
<ACCUMULATED-GAINS-PRIOR>                         3058
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              827
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1647
<AVERAGE-NET-ASSETS>                             23117<F1>
<PER-SHARE-NAV-BEGIN>                            11.72<F1>
<PER-SHARE-NII>                                    .39<F1>
<PER-SHARE-GAIN-APPREC>                           1.83<F1>
<PER-SHARE-DIVIDEND>                               .40<F1>
<PER-SHARE-DISTRIBUTIONS>                          .54<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              13.00<F1>
<EXPENSE-RATIO>                                   1.05<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 173
   <NAME> THE ONE GROUP ASSET ALLOCATION FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           153456
<INVESTMENTS-AT-VALUE>                          170647
<RECEIVABLES>                                     2706
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  173360
<PAYABLE-FOR-SECURITIES>                          2482
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          628
<TOTAL-LIABILITIES>                               3110
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        139176
<SHARES-COMMON-STOCK>                             3366<F1>
<SHARES-COMMON-PRIOR>                             1580<F1>
<ACCUMULATED-NII-CURRENT>                            5
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          13861
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         17208
<NET-ASSETS>                                    170250
<DIVIDEND-INCOME>                                 1169
<INTEREST-INCOME>                                 4334
<OTHER-INCOME>                                      35
<EXPENSES-NET>                                    1365
<NET-INVESTMENT-INCOME>                           4173
<REALIZED-GAINS-CURRENT>                         15867
<APPREC-INCREASE-CURRENT>                         4463
<NET-CHANGE-FROM-OPS>                            24503
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          734<F1>
<DISTRIBUTIONS-OF-GAINS>                          1129<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1899<F1>
<NUMBER-OF-SHARES-REDEEMED>                        263<F1>
<SHARES-REINVESTED>                                150<F1>
<NET-CHANGE-IN-ASSETS>                           83503
<ACCUMULATED-NII-PRIOR>                             19
<ACCUMULATED-GAINS-PRIOR>                         3058
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              827
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1647
<AVERAGE-NET-ASSETS>                             28324<F1>
<PER-SHARE-NAV-BEGIN>                            11.76<F1>
<PER-SHARE-NII>                                    .30<F1>
<PER-SHARE-GAIN-APPREC>                           1.83<F1>
<PER-SHARE-DIVIDEND>                               .31<F1>
<PER-SHARE-DISTRIBUTIONS>                          .54<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              13.04<F1>
<EXPENSE-RATIO>                                   1.81<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 181
   <NAME> THE ONE GROUP GOVERNMENT BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           826948
<INVESTMENTS-AT-VALUE>                          832945
<RECEIVABLES>                                     5984
<ASSETS-OTHER>                                      23
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  838952
<PAYABLE-FOR-SECURITIES>                         63696
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4377
<TOTAL-LIABILITIES>                              68073
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786147
<SHARES-COMMON-STOCK>                            74751<F1>
<SHARES-COMMON-PRIOR>                            70842<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             101
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         21164
<ACCUM-APPREC-OR-DEPREC>                          5997
<NET-ASSETS>                                    770879
<DIVIDEND-INCOME>                                    2
<INTEREST-INCOME>                                51661
<OTHER-INCOME>                                      87
<EXPENSES-NET>                                    4756
<NET-INVESTMENT-INCOME>                          46994
<REALIZED-GAINS-CURRENT>                         (894)
<APPREC-INCREASE-CURRENT>                        10875
<NET-CHANGE-FROM-OPS>                            56975
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        44081<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          22536<F1>
<NUMBER-OF-SHARES-REDEEMED>                      18817<F1>
<SHARES-REINVESTED>                                190<F1>
<NET-CHANGE-IN-ASSETS>                           43971
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            325
<OVERDIST-NET-GAINS-PRIOR>                       20043
<GROSS-ADVISORY-FEES>                             3293
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5219
<AVERAGE-NET-ASSETS>                            683629<F1>
<PER-SHARE-NAV-BEGIN>                             9.56<F1>
<PER-SHARE-NII>                                    .62<F1>
<PER-SHARE-GAIN-APPREC>                            .13<F1>
<PER-SHARE-DIVIDEND>                               .62<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.69<F1>
<EXPENSE-RATIO>                                    .62<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 182
   <NAME> THE ONE GROUP GOVERNMENT BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           826948
<INVESTMENTS-AT-VALUE>                          832945
<RECEIVABLES>                                     5984
<ASSETS-OTHER>                                      23
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  838952
<PAYABLE-FOR-SECURITIES>                         63696
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4377
<TOTAL-LIABILITIES>                              68073
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786147
<SHARES-COMMON-STOCK>                             3583<F1>
<SHARES-COMMON-PRIOR>                             4056<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             101
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         21164
<ACCUM-APPREC-OR-DEPREC>                          5997
<NET-ASSETS>                                    770879
<DIVIDEND-INCOME>                                    2
<INTEREST-INCOME>                                51661
<OTHER-INCOME>                                      87
<EXPENSES-NET>                                    4756
<NET-INVESTMENT-INCOME>                          46994
<REALIZED-GAINS-CURRENT>                         (894)
<APPREC-INCREASE-CURRENT>                        10875
<NET-CHANGE-FROM-OPS>                            56975
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2290<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            956<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1593<F1>
<SHARES-REINVESTED>                                164<F1>
<NET-CHANGE-IN-ASSETS>                           43971
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            325
<OVERDIST-NET-GAINS-PRIOR>                       20043
<GROSS-ADVISORY-FEES>                             3293
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5219
<AVERAGE-NET-ASSETS>                             36913<F1>
<PER-SHARE-NAV-BEGIN>                             9.56<F1>
<PER-SHARE-NII>                                    .60<F1>
<PER-SHARE-GAIN-APPREC>                            .13<F1>
<PER-SHARE-DIVIDEND>                               .60<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.69<F1>
<EXPENSE-RATIO>                                    .87<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 183
   <NAME> THE ONE GROUP GOVERNMENT BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           826948
<INVESTMENTS-AT-VALUE>                          832945
<RECEIVABLES>                                     5984
<ASSETS-OTHER>                                      23
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  838952
<PAYABLE-FOR-SECURITIES>                         63696
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         4377
<TOTAL-LIABILITIES>                              68073
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        786147
<SHARES-COMMON-STOCK>                             1210<F1>
<SHARES-COMMON-PRIOR>                             1128<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             101
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         21164
<ACCUM-APPREC-OR-DEPREC>                          5997
<NET-ASSETS>                                    770879
<DIVIDEND-INCOME>                                    2
<INTEREST-INCOME>                                51661
<OTHER-INCOME>                                      87
<EXPENSES-NET>                                    4756
<NET-INVESTMENT-INCOME>                          46994
<REALIZED-GAINS-CURRENT>                         (894)
<APPREC-INCREASE-CURRENT>                        10875
<NET-CHANGE-FROM-OPS>                            56975
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          623<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            302<F1>
<NUMBER-OF-SHARES-REDEEMED>                        270<F1>
<SHARES-REINVESTED>                                 50<F1>
<NET-CHANGE-IN-ASSETS>                           43971
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            325
<OVERDIST-NET-GAINS-PRIOR>                       20043
<GROSS-ADVISORY-FEES>                             3293
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   5219
<AVERAGE-NET-ASSETS>                             11285<F1>
<PER-SHARE-NAV-BEGIN>                             9.56<F1>
<PER-SHARE-NII>                                    .54<F1>
<PER-SHARE-GAIN-APPREC>                            .13<F1>
<PER-SHARE-DIVIDEND>                               .54<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.69<F1>
<EXPENSE-RATIO>                                   1.52<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 191
   <NAME> THE ONE GROUP ULTRA-SHORT TERM INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           163219
<INVESTMENTS-AT-VALUE>                          163772
<RECEIVABLES>                                     2083
<ASSETS-OTHER>                                      29
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165884
<PAYABLE-FOR-SECURITIES>                         18263
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          747
<TOTAL-LIABILITIES>                              19010
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        150589
<SHARES-COMMON-STOCK>                            11588<F1>
<SHARES-COMMON-PRIOR>                             5853<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             201
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4042
<ACCUM-APPREC-OR-DEPREC>                           528
<NET-ASSETS>                                    146874
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 6022
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     375
<NET-INVESTMENT-INCOME>                           5647
<REALIZED-GAINS-CURRENT>                         (269)
<APPREC-INCREASE-CURRENT>                         1032
<NET-CHANGE-FROM-OPS>                             6410
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         4769<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           7886<F1>
<NUMBER-OF-SHARES-REDEEMED>                       2166<F1>
<SHARES-REINVESTED>                                 15<F1>
<NET-CHANGE-IN-ASSETS>                           84485
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            313
<OVERDIST-NET-GAINS-PRIOR>                        3772
<GROSS-ADVISORY-FEES>                              520
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    832
<AVERAGE-NET-ASSETS>                             79624<F1>
<PER-SHARE-NAV-BEGIN>                             9.79<F1>
<PER-SHARE-NII>                                    .62<F1>
<PER-SHARE-GAIN-APPREC>                            .05<F1>
<PER-SHARE-DIVIDEND>                               .59<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.87<F1>
<EXPENSE-RATIO>                                    .35<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 192
   <NAME> THE ONE GROUP ULTRA-SHORT TERM INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           163219
<INVESTMENTS-AT-VALUE>                          163772
<RECEIVABLES>                                     2083
<ASSETS-OTHER>                                      29
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165884
<PAYABLE-FOR-SECURITIES>                         18263
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          747
<TOTAL-LIABILITIES>                              19010
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        150589
<SHARES-COMMON-STOCK>                             3003<F1>
<SHARES-COMMON-PRIOR>                              406<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             201
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4042
<ACCUM-APPREC-OR-DEPREC>                           528
<NET-ASSETS>                                    146874
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 6022
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     375
<NET-INVESTMENT-INCOME>                           5647
<REALIZED-GAINS-CURRENT>                         (269)
<APPREC-INCREASE-CURRENT>                         1032
<NET-CHANGE-FROM-OPS>                             6410
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          761<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           3018<F1>
<NUMBER-OF-SHARES-REDEEMED>                        480<F1>
<SHARES-REINVESTED>                                 59<F1>
<NET-CHANGE-IN-ASSETS>                           84485
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            313
<OVERDIST-NET-GAINS-PRIOR>                        3772
<GROSS-ADVISORY-FEES>                              520
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    832
<AVERAGE-NET-ASSETS>                             13268<F1>
<PER-SHARE-NAV-BEGIN>                             9.78<F1>
<PER-SHARE-NII>                                    .58<F1>
<PER-SHARE-GAIN-APPREC>                            .09<F1>
<PER-SHARE-DIVIDEND>                               .58<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.87<F1>
<EXPENSE-RATIO>                                    .61<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 193
   <NAME> THE ONE GROUP ULTRA-SHORT TERM INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           163219
<INVESTMENTS-AT-VALUE>                          163772
<RECEIVABLES>                                     2083
<ASSETS-OTHER>                                      29
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  165884
<PAYABLE-FOR-SECURITIES>                         18263
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          747
<TOTAL-LIABILITIES>                              19010
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        150589
<SHARES-COMMON-STOCK>                              287<F1>
<SHARES-COMMON-PRIOR>                              117<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             201
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          4042
<ACCUM-APPREC-OR-DEPREC>                           528
<NET-ASSETS>                                    146874
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                 6022
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     375
<NET-INVESTMENT-INCOME>                           5647
<REALIZED-GAINS-CURRENT>                         (269)
<APPREC-INCREASE-CURRENT>                         1032
<NET-CHANGE-FROM-OPS>                             6410
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           94<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            225<F1>
<NUMBER-OF-SHARES-REDEEMED>                         62<F1>
<SHARES-REINVESTED>                                  7<F1>
<NET-CHANGE-IN-ASSETS>                           84485
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            313
<OVERDIST-NET-GAINS-PRIOR>                        3772
<GROSS-ADVISORY-FEES>                              520
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    832
<AVERAGE-NET-ASSETS>                              1704<F1>
<PER-SHARE-NAV-BEGIN>                             9.76<F1>
<PER-SHARE-NII>                                    .54<F1>
<PER-SHARE-GAIN-APPREC>                            .05<F1>
<PER-SHARE-DIVIDEND>                               .54<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.81<F1>
<EXPENSE-RATIO>                                   1.07<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 201
   <NAME> THE ONE GROUP MUNICIPAL INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           476532
<INVESTMENTS-AT-VALUE>                          486211
<RECEIVABLES>                                     8369
<ASSETS-OTHER>                                       2
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  494582
<PAYABLE-FOR-SECURITIES>                          5442
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2476
<TOTAL-LIABILITIES>                               7918
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        485576
<SHARES-COMMON-STOCK>                            41518<F1>
<SHARES-COMMON-PRIOR>                            24956<F1>
<ACCUMULATED-NII-CURRENT>                           18
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          8609
<ACCUM-APPREC-OR-DEPREC>                          9679
<NET-ASSETS>                                    486664
<DIVIDEND-INCOME>                                   95
<INTEREST-INCOME>                                22398
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2491
<NET-INVESTMENT-INCOME>                          20002
<REALIZED-GAINS-CURRENT>                         (530)
<APPREC-INCREASE-CURRENT>                         7608
<NET-CHANGE-FROM-OPS>                            27080
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        17054<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          21619<F1>
<NUMBER-OF-SHARES-REDEEMED>                       5078<F1>
<SHARES-REINVESTED>                                 20<F1>
<NET-CHANGE-IN-ASSETS>                          196558
<ACCUMULATED-NII-PRIOR>                             20
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        8079
<GROSS-ADVISORY-FEES>                             1703
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2957
<AVERAGE-NET-ASSETS>                            317173<F1>
<PER-SHARE-NAV-BEGIN>                             9.66<F1>
<PER-SHARE-NII>                                    .53<F1>
<PER-SHARE-GAIN-APPREC>                            .18<F1>
<PER-SHARE-DIVIDEND>                               .53<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.84<F1>
<EXPENSE-RATIO>                                    .57<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 202
   <NAME> THE ONE GROUP MUNICIPAL INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           476532
<INVESTMENTS-AT-VALUE>                          486211
<RECEIVABLES>                                     8369
<ASSETS-OTHER>                                       2
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  494582
<PAYABLE-FOR-SECURITIES>                          5442
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2476
<TOTAL-LIABILITIES>                               7918
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        485576
<SHARES-COMMON-STOCK>                             4237<F1>
<SHARES-COMMON-PRIOR>                             2662<F1>
<ACCUMULATED-NII-CURRENT>                           18
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          8609
<ACCUM-APPREC-OR-DEPREC>                          9679
<NET-ASSETS>                                    486664
<DIVIDEND-INCOME>                                   95
<INTEREST-INCOME>                                22398
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2491
<NET-INVESTMENT-INCOME>                          20002
<REALIZED-GAINS-CURRENT>                         (530)
<APPREC-INCREASE-CURRENT>                         7608
<NET-CHANGE-FROM-OPS>                            27080
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1627<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           2459<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1002<F1>
<SHARES-REINVESTED>                                119<F1>
<NET-CHANGE-IN-ASSETS>                          196558
<ACCUMULATED-NII-PRIOR>                             20
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        8079
<GROSS-ADVISORY-FEES>                             1703
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2957
<AVERAGE-NET-ASSETS>                             31802<F1>
<PER-SHARE-NAV-BEGIN>                             9.69<F1>
<PER-SHARE-NII>                                    .51<F1>
<PER-SHARE-GAIN-APPREC>                            .18<F1>
<PER-SHARE-DIVIDEND>                               .51<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.87<F1>
<EXPENSE-RATIO>                                    .82<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 203
   <NAME> THE ONE GROUP MUNICIPAL INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           476532
<INVESTMENTS-AT-VALUE>                          486211
<RECEIVABLES>                                     8369
<ASSETS-OTHER>                                       2
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  494582
<PAYABLE-FOR-SECURITIES>                          5442
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         2476
<TOTAL-LIABILITIES>                               7918
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        485576
<SHARES-COMMON-STOCK>                             3686<F1>
<SHARES-COMMON-PRIOR>                             2403<F1>
<ACCUMULATED-NII-CURRENT>                           18
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          8609
<ACCUM-APPREC-OR-DEPREC>                          9679
<NET-ASSETS>                                    486664
<DIVIDEND-INCOME>                                   95
<INTEREST-INCOME>                                22398
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    2491
<NET-INVESTMENT-INCOME>                          20002
<REALIZED-GAINS-CURRENT>                         (530)
<APPREC-INCREASE-CURRENT>                         7608
<NET-CHANGE-FROM-OPS>                            27080
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1321<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1547<F1>
<NUMBER-OF-SHARES-REDEEMED>                        356<F1>
<SHARES-REINVESTED>                                 92<F1>
<NET-CHANGE-IN-ASSETS>                          196558
<ACCUMULATED-NII-PRIOR>                             20
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        8079
<GROSS-ADVISORY-FEES>                             1703
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   2957
<AVERAGE-NET-ASSETS>                             29395<F1>
<PER-SHARE-NAV-BEGIN>                             9.66<F1>
<PER-SHARE-NII>                                    .44<F1>
<PER-SHARE-GAIN-APPREC>                            .18<F1>
<PER-SHARE-DIVIDEND>                               .44<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.84<F1>
<EXPENSE-RATIO>                                   1.47<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 211
   <NAME> THE ONE GROUP OHIO MUNICIPAL MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            85389
<INVESTMENTS-AT-VALUE>                           85389
<RECEIVABLES>                                      499
<ASSETS-OTHER>                                    1324
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   87212
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          291
<TOTAL-LIABILITIES>                                291
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         87012
<SHARES-COMMON-STOCK>                            56481<F1>
<SHARES-COMMON-PRIOR>                            55946<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                              75
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            16
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                     86921
<DIVIDEND-INCOME>                                   67
<INTEREST-INCOME>                                 3112
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     452
<NET-INVESTMENT-INCOME>                           2727
<REALIZED-GAINS-CURRENT>                          (15)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                             2712
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1662<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                         178921<F1>
<NUMBER-OF-SHARES-REDEEMED>                     178473<F1>
<SHARES-REINVESTED>                                 87<F1>
<NET-CHANGE-IN-ASSETS>                         (10126)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                             51
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              268
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    604
<AVERAGE-NET-ASSETS>                             52497<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .032<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .032<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .40<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 212
   <NAME> THE ONE GROUP OHIO MUNICIPAL MONEY MARKET FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            85389
<INVESTMENTS-AT-VALUE>                           85389
<RECEIVABLES>                                      499
<ASSETS-OTHER>                                    1324
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   87212
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          291
<TOTAL-LIABILITIES>                                291
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         87012
<SHARES-COMMON-STOCK>                            30506<F1>
<SHARES-COMMON-PRIOR>                            41152<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                              75
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            16
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                     86921
<DIVIDEND-INCOME>                                   67
<INTEREST-INCOME>                                 3112
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     452
<NET-INVESTMENT-INCOME>                           2727
<REALIZED-GAINS-CURRENT>                          (15)
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                             2712
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1065<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                         180474<F1>
<NUMBER-OF-SHARES-REDEEMED>                     192100<F1>
<SHARES-REINVESTED>                                980<F1>
<NET-CHANGE-IN-ASSETS>                         (10126)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                             51
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              268
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    604
<AVERAGE-NET-ASSETS>                             36776<F1>
<PER-SHARE-NAV-BEGIN>                             1.00<F1>
<PER-SHARE-NII>                                   .029<F1>
<PER-SHARE-GAIN-APPREC>                              0<F1>
<PER-SHARE-DIVIDEND>                              .029<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                               1.00<F1>
<EXPENSE-RATIO>                                    .65<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 221
   <NAME> THE ONE GROUP INTERMEDIATE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           555733
<INVESTMENTS-AT-VALUE>                          558077
<RECEIVABLES>                                     6604
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  564682
<PAYABLE-FOR-SECURITIES>                         10073
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3271
<TOTAL-LIABILITIES>                              13344
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        554206
<SHARES-COMMON-STOCK>                            52660<F1>
<SHARES-COMMON-PRIOR>                            23457<F1>
<ACCUMULATED-NII-CURRENT>                           69
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          5281
<ACCUM-APPREC-OR-DEPREC>                          2344
<NET-ASSETS>                                    551338
<DIVIDEND-INCOME>                                    1
<INTEREST-INCOME>                                28044
<OTHER-INCOME>                                     200
<EXPENSES-NET>                                    2228
<NET-INVESTMENT-INCOME>                          26017
<REALIZED-GAINS-CURRENT>                         (935)
<APPREC-INCREASE-CURRENT>                         3378
<NET-CHANGE-FROM-OPS>                            28460
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        24622<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          38383<F1>
<NUMBER-OF-SHARES-REDEEMED>                       9247<F1>
<SHARES-REINVESTED>                                 67<F1>
<NET-CHANGE-IN-ASSETS>                          300743
<ACCUMULATED-NII-PRIOR>                             94
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        4368
<GROSS-ADVISORY-FEES>                             2365
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3343
<AVERAGE-NET-ASSETS>                            371437<F1>
<PER-SHARE-NAV-BEGIN>                             9.84<F1>
<PER-SHARE-NII>                                    .62<F1>
<PER-SHARE-GAIN-APPREC>                            .08<F1>
<PER-SHARE-DIVIDEND>                               .65<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.92<F1>
<EXPENSE-RATIO>                                    .54<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 222
   <NAME> THE ONE GROUP INTERMEDIATE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           555733
<INVESTMENTS-AT-VALUE>                          558077
<RECEIVABLES>                                     6604
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  564682
<PAYABLE-FOR-SECURITIES>                         10073
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3271
<TOTAL-LIABILITIES>                              13344
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        554206
<SHARES-COMMON-STOCK>                             1886<F1>
<SHARES-COMMON-PRIOR>                             1389<F1>
<ACCUMULATED-NII-CURRENT>                           69
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          5281
<ACCUM-APPREC-OR-DEPREC>                          2344
<NET-ASSETS>                                    551338
<DIVIDEND-INCOME>                                    1
<INTEREST-INCOME>                                28044
<OTHER-INCOME>                                     200
<EXPENSES-NET>                                    2228
<NET-INVESTMENT-INCOME>                          26017
<REALIZED-GAINS-CURRENT>                         (935)
<APPREC-INCREASE-CURRENT>                         3378
<NET-CHANGE-FROM-OPS>                            28460
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          940<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            951<F1>
<NUMBER-OF-SHARES-REDEEMED>                        522<F1>
<SHARES-REINVESTED>                                 68<F1>
<NET-CHANGE-IN-ASSETS>                          300743
<ACCUMULATED-NII-PRIOR>                             94
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        4368
<GROSS-ADVISORY-FEES>                             2365
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3343
<AVERAGE-NET-ASSETS>                             14813<F1>
<PER-SHARE-NAV-BEGIN>                             9.87<F1>
<PER-SHARE-NII>                                    .63<F1>
<PER-SHARE-GAIN-APPREC>                            .08<F1>
<PER-SHARE-DIVIDEND>                               .63<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.95<F1>
<EXPENSE-RATIO>                                    .78<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 223
   <NAME> THE ONE GROUP INTERMEDIATE BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           555733
<INVESTMENTS-AT-VALUE>                          558077
<RECEIVABLES>                                     6604
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  564682
<PAYABLE-FOR-SECURITIES>                         10073
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         3271
<TOTAL-LIABILITIES>                              13344
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        554206
<SHARES-COMMON-STOCK>                             1023<F1>
<SHARES-COMMON-PRIOR>                              618<F1>
<ACCUMULATED-NII-CURRENT>                           69
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          5281
<ACCUM-APPREC-OR-DEPREC>                          2344
<NET-ASSETS>                                    551338
<DIVIDEND-INCOME>                                    1
<INTEREST-INCOME>                                28044
<OTHER-INCOME>                                     200
<EXPENSES-NET>                                    2228
<NET-INVESTMENT-INCOME>                          26017
<REALIZED-GAINS-CURRENT>                         (935)
<APPREC-INCREASE-CURRENT>                         3378
<NET-CHANGE-FROM-OPS>                            28460
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          455<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            515<F1>
<NUMBER-OF-SHARES-REDEEMED>                        144<F1>
<SHARES-REINVESTED>                                 34<F1>
<NET-CHANGE-IN-ASSETS>                          300743
<ACCUMULATED-NII-PRIOR>                             94
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        4368
<GROSS-ADVISORY-FEES>                             2365
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3343
<AVERAGE-NET-ASSETS>                              7970<F1>
<PER-SHARE-NAV-BEGIN>                             9.83<F1>
<PER-SHARE-NII>                                    .56<F1>
<PER-SHARE-GAIN-APPREC>                            .09<F1>
<PER-SHARE-DIVIDEND>                               .56<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.92<F1>
<EXPENSE-RATIO>                                   1.44<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 231
   <NAME> THE ONE GROUP LARGE COMPANY GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           953962
<INVESTMENTS-AT-VALUE>                         1402162
<RECEIVABLES>                                    21616
<ASSETS-OTHER>                                      22
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1423800
<PAYABLE-FOR-SECURITIES>                         21081
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1677
<TOTAL-LIABILITIES>                              22758
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        843217
<SHARES-COMMON-STOCK>                            58802<F1>
<SHARES-COMMON-PRIOR>                            48320<F1>
<ACCUMULATED-NII-CURRENT>                           45
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         109580
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        448200
<NET-ASSETS>                                   1401042
<DIVIDEND-INCOME>                                16518
<INTEREST-INCOME>                                 1314
<OTHER-INCOME>                                     191
<EXPENSES-NET>                                   11766
<NET-INVESTMENT-INCOME>                           6257
<REALIZED-GAINS-CURRENT>                        130961
<APPREC-INCREASE-CURRENT>                       186164
<NET-CHANGE-FROM-OPS>                           323382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         5746<F1>
<DISTRIBUTIONS-OF-GAINS>                         37414<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          25601<F1>
<NUMBER-OF-SHARES-REDEEMED>                      16537<F1>
<SHARES-REINVESTED>                               1418<F1>
<NET-CHANGE-IN-ASSETS>                          523681
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        24128
<OVERDISTRIB-NII-PRIOR>                             85
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             7948
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  11861
<AVERAGE-NET-ASSETS>                            892530<F1>
<PER-SHARE-NAV-BEGIN>                            15.44<F1>
<PER-SHARE-NII>                                    .12<F1>
<PER-SHARE-GAIN-APPREC>                           4.79<F1>
<PER-SHARE-DIVIDEND>                               .11<F1>
<PER-SHARE-DISTRIBUTIONS>                          .80<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              19.44<F1>
<EXPENSE-RATIO>                                    .99<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 232
   <NAME> THE ONE GROUP LARGE COMPANY GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           953962
<INVESTMENTS-AT-VALUE>                         1402162
<RECEIVABLES>                                    21616
<ASSETS-OTHER>                                      22
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1423800
<PAYABLE-FOR-SECURITIES>                         21081
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1677
<TOTAL-LIABILITIES>                              22758
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        843217
<SHARES-COMMON-STOCK>                             6322<F1>
<SHARES-COMMON-PRIOR>                             4745<F1>
<ACCUMULATED-NII-CURRENT>                           45
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         109580
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        448200
<NET-ASSETS>                                   1401042
<DIVIDEND-INCOME>                                16518
<INTEREST-INCOME>                                 1314
<OTHER-INCOME>                                     191
<EXPENSES-NET>                                   11766
<NET-INVESTMENT-INCOME>                           6257
<REALIZED-GAINS-CURRENT>                        130961
<APPREC-INCREASE-CURRENT>                       186164
<NET-CHANGE-FROM-OPS>                           323382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          403<F1>
<DISTRIBUTIONS-OF-GAINS>                          4265<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           2308<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1016<F1>
<SHARES-REINVESTED>                                285<F1>
<NET-CHANGE-IN-ASSETS>                          523681
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        24128
<OVERDISTRIB-NII-PRIOR>                             85
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             7948
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  11861
<AVERAGE-NET-ASSETS>                             94988<F1>
<PER-SHARE-NAV-BEGIN>                            15.83<F1>
<PER-SHARE-NII>                                    .08<F1>
<PER-SHARE-GAIN-APPREC>                           4.88<F1>
<PER-SHARE-DIVIDEND>                               .07<F1>
<PER-SHARE-DISTRIBUTIONS>                          .80<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              19.92<F1>
<EXPENSE-RATIO>                                   1.24<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 233
   <NAME> THE ONE GROUP LARGE COMPANY GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           953962
<INVESTMENTS-AT-VALUE>                         1402162
<RECEIVABLES>                                    21616
<ASSETS-OTHER>                                      22
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 1423800
<PAYABLE-FOR-SECURITIES>                         21081
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1677
<TOTAL-LIABILITIES>                              22758
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        843217
<SHARES-COMMON-STOCK>                             6744<F1>
<SHARES-COMMON-PRIOR>                             3600<F1>
<ACCUMULATED-NII-CURRENT>                           45
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                         109580
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        448200
<NET-ASSETS>                                   1401042
<DIVIDEND-INCOME>                                16518
<INTEREST-INCOME>                                 1314
<OTHER-INCOME>                                     191
<EXPENSES-NET>                                   11766
<NET-INVESTMENT-INCOME>                           6257
<REALIZED-GAINS-CURRENT>                        130961
<APPREC-INCREASE-CURRENT>                       186164
<NET-CHANGE-FROM-OPS>                           323382
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           23<F1>
<DISTRIBUTIONS-OF-GAINS>                          3785<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           3373<F1>
<NUMBER-OF-SHARES-REDEEMED>                        462<F1>
<SHARES-REINVESTED>                                233<F1>
<NET-CHANGE-IN-ASSETS>                          523681
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        24128
<OVERDISTRIB-NII-PRIOR>                             85
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             7948
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  11861
<AVERAGE-NET-ASSETS>                             86571<F1>
<PER-SHARE-NAV-BEGIN>                            15.63<F1>
<PER-SHARE-NII>                                  (.04)<F1>
<PER-SHARE-GAIN-APPREC>                           4.82<F1>
<PER-SHARE-DIVIDEND>                               .00<F1>
<PER-SHARE-DISTRIBUTIONS>                          .80<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              19.61<F1>
<EXPENSE-RATIO>                                   2.00<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 241
   <NAME> THE ONE GROUP KENTUCKY MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           117316
<INVESTMENTS-AT-VALUE>                          123428
<RECEIVABLES>                                     1978
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  125406
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          623
<TOTAL-LIABILITIES>                                623
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        120470
<SHARES-COMMON-STOCK>                            11450<F1>
<SHARES-COMMON-PRIOR>                             3018<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          1799
<ACCUM-APPREC-OR-DEPREC>                          6112
<NET-ASSETS>                                    124783
<DIVIDEND-INCOME>                                   54
<INTEREST-INCOME>                                 4351
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     491
<NET-INVESTMENT-INCOME>                           3914
<REALIZED-GAINS-CURRENT>                            16
<APPREC-INCREASE-CURRENT>                         1197
<NET-CHANGE-FROM-OPS>                             5127
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         3488<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           9492<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1061<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           84848
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        1815
<GROSS-ADVISORY-FEES>                              348
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    578
<AVERAGE-NET-ASSETS>                             68144<F1>
<PER-SHARE-NAV-BEGIN>                            10.04<F1>
<PER-SHARE-NII>                                    .50<F1>
<PER-SHARE-GAIN-APPREC>                            .16<F1>
<PER-SHARE-DIVIDEND>                               .50<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.20<F1>
<EXPENSE-RATIO>                                    .59<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 242
   <NAME> THE ONE GROUP KENTUCKY MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           117316
<INVESTMENTS-AT-VALUE>                          123428
<RECEIVABLES>                                     1978
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  125406
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          623
<TOTAL-LIABILITIES>                                623
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        120470
<SHARES-COMMON-STOCK>                              544<F1>
<SHARES-COMMON-PRIOR>                              814<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          1799
<ACCUM-APPREC-OR-DEPREC>                          6112
<NET-ASSETS>                                    124783
<DIVIDEND-INCOME>                                   54
<INTEREST-INCOME>                                 4351
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     491
<NET-INVESTMENT-INCOME>                           3914
<REALIZED-GAINS-CURRENT>                            16
<APPREC-INCREASE-CURRENT>                         1197
<NET-CHANGE-FROM-OPS>                             5127
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          346<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             42<F1>
<NUMBER-OF-SHARES-REDEEMED>                        331<F1>
<SHARES-REINVESTED>                                 19<F1>
<NET-CHANGE-IN-ASSETS>                           84848
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        1815
<GROSS-ADVISORY-FEES>                              348
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    578
<AVERAGE-NET-ASSETS>                              7345<F1>
<PER-SHARE-NAV-BEGIN>                            10.05<F1>
<PER-SHARE-NII>                                    .48<F1>
<PER-SHARE-GAIN-APPREC>                            .16<F1>
<PER-SHARE-DIVIDEND>                               .48<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.21<F1>
<EXPENSE-RATIO>                                    .84<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 243
   <NAME> THE ONE GROUP KENTUCKY MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           117316
<INVESTMENTS-AT-VALUE>                          123428
<RECEIVABLES>                                     1978
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  125406
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          623
<TOTAL-LIABILITIES>                                623
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        120470
<SHARES-COMMON-STOCK>                              236<F1>
<SHARES-COMMON-PRIOR>                              146<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                          1799
<ACCUM-APPREC-OR-DEPREC>                          6112
<NET-ASSETS>                                    124783
<DIVIDEND-INCOME>                                   54
<INTEREST-INCOME>                                 4351
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     491
<NET-INVESTMENT-INCOME>                           3914
<REALIZED-GAINS-CURRENT>                            16
<APPREC-INCREASE-CURRENT>                         1197
<NET-CHANGE-FROM-OPS>                             5127
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           80<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            110<F1>
<NUMBER-OF-SHARES-REDEEMED>                         23<F1>
<SHARES-REINVESTED>                                  4<F1>
<NET-CHANGE-IN-ASSETS>                           84848
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        1815
<GROSS-ADVISORY-FEES>                              348
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    578
<AVERAGE-NET-ASSETS>                              1977<F1>
<PER-SHARE-NAV-BEGIN>                             9.99<F1>
<PER-SHARE-NII>                                    .41<F1>
<PER-SHARE-GAIN-APPREC>                            .16<F1>
<PER-SHARE-DIVIDEND>                               .41<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.15<F1>
<EXPENSE-RATIO>                                   1.47<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 251
   <NAME> THE ONE GROUP LOUISIANA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           157802
<INVESTMENTS-AT-VALUE>                          164152
<RECEIVABLES>                                     2996
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  167148
<PAYABLE-FOR-SECURITIES>                           689
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          788
<TOTAL-LIABILITIES>                               1477
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        159996
<SHARES-COMMON-STOCK>                            11221<F1>
<SHARES-COMMON-PRIOR>                            13706<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                           675
<ACCUM-APPREC-OR-DEPREC>                          6350
<NET-ASSETS>                                    165671
<DIVIDEND-INCOME>                                   36
<INTEREST-INCOME>                                 9906
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1275
<NET-INVESTMENT-INCOME>                           8667
<REALIZED-GAINS-CURRENT>                          (79)
<APPREC-INCREASE-CURRENT>                         3224
<NET-CHANGE-FROM-OPS>                            11812
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         6174<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            538<F1>
<NUMBER-OF-SHARES-REDEEMED>                       3023<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                         (27072)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                         596
<GROSS-ADVISORY-FEES>                             1077
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1723
<AVERAGE-NET-ASSETS>                            125664<F1>
<PER-SHARE-NAV-BEGIN>                             9.93<F1>
<PER-SHARE-NII>                                    .49<F1>
<PER-SHARE-GAIN-APPREC>                            .17<F1>
<PER-SHARE-DIVIDEND>                               .49<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.10<F1>
<EXPENSE-RATIO>                                    .62<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 252
   <NAME> THE ONE GROUP LOUISIANA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           157802
<INVESTMENTS-AT-VALUE>                          164152
<RECEIVABLES>                                     2996
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  167148
<PAYABLE-FOR-SECURITIES>                           689
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          788
<TOTAL-LIABILITIES>                               1477
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        159996
<SHARES-COMMON-STOCK>                             4802<F1>
<SHARES-COMMON-PRIOR>                             5388<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                           675
<ACCUM-APPREC-OR-DEPREC>                          6350
<NET-ASSETS>                                    165671
<DIVIDEND-INCOME>                                   36
<INTEREST-INCOME>                                 9906
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1275
<NET-INVESTMENT-INCOME>                           8667
<REALIZED-GAINS-CURRENT>                          (79)
<APPREC-INCREASE-CURRENT>                         3224
<NET-CHANGE-FROM-OPS>                            11812
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2349<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            403<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1140<F1>
<SHARES-REINVESTED>                                151<F1>
<NET-CHANGE-IN-ASSETS>                         (27072)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                         596
<GROSS-ADVISORY-FEES>                             1077
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1723
<AVERAGE-NET-ASSETS>                             50367<F1>
<PER-SHARE-NAV-BEGIN>                             9.93<F1>
<PER-SHARE-NII>                                    .47<F1>
<PER-SHARE-GAIN-APPREC>                            .17<F1>
<PER-SHARE-DIVIDEND>                               .47<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.10<F1>
<EXPENSE-RATIO>                                    .87<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 253
   <NAME> THE ONE GROUP LOUISIANA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           157802
<INVESTMENTS-AT-VALUE>                          164152
<RECEIVABLES>                                     2996
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  167148
<PAYABLE-FOR-SECURITIES>                           689
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          788
<TOTAL-LIABILITIES>                               1477
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        159996
<SHARES-COMMON-STOCK>                              380<F1>
<SHARES-COMMON-PRIOR>                              325<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                           675
<ACCUM-APPREC-OR-DEPREC>                          6350
<NET-ASSETS>                                    165671
<DIVIDEND-INCOME>                                   36
<INTEREST-INCOME>                                 9906
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    1275
<NET-INVESTMENT-INCOME>                           8667
<REALIZED-GAINS-CURRENT>                          (79)
<APPREC-INCREASE-CURRENT>                         3224
<NET-CHANGE-FROM-OPS>                            11812
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          144<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             72<F1>
<NUMBER-OF-SHARES-REDEEMED>                         27<F1>
<SHARES-REINVESTED>                                 10<F1>
<NET-CHANGE-IN-ASSETS>                         (27072)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                         596
<GROSS-ADVISORY-FEES>                             1077
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1723
<AVERAGE-NET-ASSETS>                              3579<F1>
<PER-SHARE-NAV-BEGIN>                             9.93<F1>
<PER-SHARE-NII>                                    .40<F1>
<PER-SHARE-GAIN-APPREC>                            .17<F1>
<PER-SHARE-DIVIDEND>                               .40<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.10<F1>
<EXPENSE-RATIO>                                   1.51<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 261
   <NAME> THE ONE GROUP GULF SOUTH GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75832
<INVESTMENTS-AT-VALUE>                           99957
<RECEIVABLES>                                     1305
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  101268
<PAYABLE-FOR-SECURITIES>                          1665
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          151
<TOTAL-LIABILITIES>                               1816
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         70806
<SHARES-COMMON-STOCK>                             7159<F1>
<SHARES-COMMON-PRIOR>                             7757<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             176
<ACCUMULATED-NET-GAINS>                           4697
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         24125
<NET-ASSETS>                                     99452
<DIVIDEND-INCOME>                                  546
<INTEREST-INCOME>                                  237
<OTHER-INCOME>                                      69
<EXPENSES-NET>                                    1083
<NET-INVESTMENT-INCOME>                          (231)
<REALIZED-GAINS-CURRENT>                         10486
<APPREC-INCREASE-CURRENT>                         1985
<NET-CHANGE-FROM-OPS>                            12240
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                          8358<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            933<F1>
<NUMBER-OF-SHARES-REDEEMED>                       2352<F1>
<SHARES-REINVESTED>                                821<F1>
<NET-CHANGE-IN-ASSETS>                          (4820)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         4708
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              730
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1200
<AVERAGE-NET-ASSETS>                             78130<F1>
<PER-SHARE-NAV-BEGIN>                            10.75<F1>
<PER-SHARE-NII>                                  (.02)<F1>
<PER-SHARE-GAIN-APPREC>                           1.31<F1>
<PER-SHARE-DIVIDEND>                               .00<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.10<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.94<F1>
<EXPENSE-RATIO>                                   1.02<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 262
   <NAME> THE ONE GROUP GULF SOUTH GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75832
<INVESTMENTS-AT-VALUE>                           99957
<RECEIVABLES>                                     1305
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  101268
<PAYABLE-FOR-SECURITIES>                          1665
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          151
<TOTAL-LIABILITIES>                               1816
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         70806
<SHARES-COMMON-STOCK>                             1581<F1>
<SHARES-COMMON-PRIOR>                             1710<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             176
<ACCUMULATED-NET-GAINS>                           4697
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         24125
<NET-ASSETS>                                     99452
<DIVIDEND-INCOME>                                  546
<INTEREST-INCOME>                                  237
<OTHER-INCOME>                                      69
<EXPENSES-NET>                                    1083
<NET-INVESTMENT-INCOME>                          (231)
<REALIZED-GAINS-CURRENT>                         10486
<APPREC-INCREASE-CURRENT>                         1985
<NET-CHANGE-FROM-OPS>                            12240
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                          1835<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            354<F1>
<NUMBER-OF-SHARES-REDEEMED>                        673<F1>
<SHARES-REINVESTED>                                190<F1>
<NET-CHANGE-IN-ASSETS>                          (4820)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         4708
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              730
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1200
<AVERAGE-NET-ASSETS>                             17349<F1>
<PER-SHARE-NAV-BEGIN>                            10.73<F1>
<PER-SHARE-NII>                                  (.04)<F1>
<PER-SHARE-GAIN-APPREC>                           1.35<F1>
<PER-SHARE-DIVIDEND>                               .00<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.10<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.94<F1>
<EXPENSE-RATIO>                                   1.27<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 263
   <NAME> THE ONE GROUP GULF SOUTH GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75832
<INVESTMENTS-AT-VALUE>                           99957
<RECEIVABLES>                                     1305
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  101268
<PAYABLE-FOR-SECURITIES>                          1665
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          151
<TOTAL-LIABILITIES>                               1816
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         70806
<SHARES-COMMON-STOCK>                              354<F1>
<SHARES-COMMON-PRIOR>                              237<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             176
<ACCUMULATED-NET-GAINS>                           4697
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         24125
<NET-ASSETS>                                     99452
<DIVIDEND-INCOME>                                  546
<INTEREST-INCOME>                                  237
<OTHER-INCOME>                                      69
<EXPENSES-NET>                                    1083
<NET-INVESTMENT-INCOME>                          (231)
<REALIZED-GAINS-CURRENT>                         10486
<APPREC-INCREASE-CURRENT>                         1985
<NET-CHANGE-FROM-OPS>                            12240
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                           302<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            146<F1>
<NUMBER-OF-SHARES-REDEEMED>                         60<F1>
<SHARES-REINVESTED>                                 31<F1>
<NET-CHANGE-IN-ASSETS>                          (4820)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                         4708
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              730
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   1200
<AVERAGE-NET-ASSETS>                              3211<F1>
<PER-SHARE-NAV-BEGIN>                            10.72<F1>
<PER-SHARE-NII>                                  (.10)<F1>
<PER-SHARE-GAIN-APPREC>                           1.32<F1>
<PER-SHARE-DIVIDEND>                               .00<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.10<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.84<F1>
<EXPENSE-RATIO>                                   2.02<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 271
   <NAME> THE ONE GROUP VALUE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           412230
<INVESTMENTS-AT-VALUE>                          488852
<RECEIVABLES>                                     1583
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  490436
<PAYABLE-FOR-SECURITIES>                           974
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          802
<TOTAL-LIABILITIES>                               1776
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380040
<SHARES-COMMON-STOCK>                            37439<F1>
<SHARES-COMMON-PRIOR>                            18398<F1>
<ACCUMULATED-NII-CURRENT>                           12
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          31654
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         76954
<NET-ASSETS>                                    488660
<DIVIDEND-INCOME>                                 5561
<INTEREST-INCOME>                                  943
<OTHER-INCOME>                                      77
<EXPENSES-NET>                                    3330
<NET-INVESTMENT-INCOME>                           3251
<REALIZED-GAINS-CURRENT>                         42586
<APPREC-INCREASE-CURRENT>                        51518
<NET-CHANGE-FROM-OPS>                            97355
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2906<F1>
<DISTRIBUTIONS-OF-GAINS>                         36353<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          21444<F1>
<NUMBER-OF-SHARES-REDEEMED>                       5755<F1>
<SHARES-REINVESTED>                               3352<F1>
<NET-CHANGE-IN-ASSETS>                          256791
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        32307
<OVERDISTRIB-NII-PRIOR>                             12
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2379
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3439
<AVERAGE-NET-ASSETS>                            274982<F1>
<PER-SHARE-NAV-BEGIN>                            10.39<F1>
<PER-SHARE-NII>                                    .11<F1>
<PER-SHARE-GAIN-APPREC>                           2.85<F1>
<PER-SHARE-DIVIDEND>                               .11<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.73<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              11.51<F1>
<EXPENSE-RATIO>                                    .98<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 272
   <NAME> THE ONE GROUP VALUE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           412230
<INVESTMENTS-AT-VALUE>                          488852
<RECEIVABLES>                                     1583
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  490436
<PAYABLE-FOR-SECURITIES>                           974
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          802
<TOTAL-LIABILITIES>                               1776
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380040
<SHARES-COMMON-STOCK>                             4113<F1>
<SHARES-COMMON-PRIOR>                             3462<F1>
<ACCUMULATED-NII-CURRENT>                           12
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          31654
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         76954
<NET-ASSETS>                                    488660
<DIVIDEND-INCOME>                                 5561
<INTEREST-INCOME>                                  943
<OTHER-INCOME>                                      77
<EXPENSES-NET>                                    3330
<NET-INVESTMENT-INCOME>                           3251
<REALIZED-GAINS-CURRENT>                         42586
<APPREC-INCREASE-CURRENT>                        51518
<NET-CHANGE-FROM-OPS>                            97355
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          316<F1>
<DISTRIBUTIONS-OF-GAINS>                          5893<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            929<F1>
<NUMBER-OF-SHARES-REDEEMED>                        893<F1>
<SHARES-REINVESTED>                                615<F1>
<NET-CHANGE-IN-ASSETS>                          256791
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        32307
<OVERDISTRIB-NII-PRIOR>                             12
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2379
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3439
<AVERAGE-NET-ASSETS>                             39510<F1>
<PER-SHARE-NAV-BEGIN>                            10.39<F1>
<PER-SHARE-NII>                                    .09<F1>
<PER-SHARE-GAIN-APPREC>                           2.83<F1>
<PER-SHARE-DIVIDEND>                               .08<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.73<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              11.50<F1>
<EXPENSE-RATIO>                                   1.23<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 273
   <NAME> THE ONE GROUP VALUE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           412230
<INVESTMENTS-AT-VALUE>                          488852
<RECEIVABLES>                                     1583
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  490436
<PAYABLE-FOR-SECURITIES>                           974
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          802
<TOTAL-LIABILITIES>                               1776
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        380040
<SHARES-COMMON-STOCK>                              917<F1>
<SHARES-COMMON-PRIOR>                              450<F1>
<ACCUMULATED-NII-CURRENT>                           12
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          31654
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         76954
<NET-ASSETS>                                    488660
<DIVIDEND-INCOME>                                 5561
<INTEREST-INCOME>                                  943
<OTHER-INCOME>                                      77
<EXPENSES-NET>                                    3330
<NET-INVESTMENT-INCOME>                           3251
<REALIZED-GAINS-CURRENT>                         42586
<APPREC-INCREASE-CURRENT>                        51518
<NET-CHANGE-FROM-OPS>                            97355
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           16<F1>
<DISTRIBUTIONS-OF-GAINS>                           992<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            453<F1>
<NUMBER-OF-SHARES-REDEEMED>                         90<F1>
<SHARES-REINVESTED>                                104<F1>
<NET-CHANGE-IN-ASSETS>                          256791
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                        32307
<OVERDISTRIB-NII-PRIOR>                             12
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             2379
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                   3439
<AVERAGE-NET-ASSETS>                              6969<F1>
<PER-SHARE-NAV-BEGIN>                            10.39<F1>
<PER-SHARE-NII>                                    .01<F1>
<PER-SHARE-GAIN-APPREC>                           2.82<F1>
<PER-SHARE-DIVIDEND>                               .02<F1>
<PER-SHARE-DISTRIBUTIONS>                         1.73<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              11.47<F1>
<EXPENSE-RATIO>                                   1.98<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 291
   <NAME> THE ONE GROUP WEST VIRGINIA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            94924
<INVESTMENTS-AT-VALUE>                           99437
<RECEIVABLES>                                     1354
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  100794
<PAYABLE-FOR-SECURITIES>                          2622
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          480
<TOTAL-LIABILITIES>                               3102
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         93207
<SHARES-COMMON-STOCK>                             9567<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            28
<ACCUM-APPREC-OR-DEPREC>                          4513
<NET-ASSETS>                                     97692
<DIVIDEND-INCOME>                                   45
<INTEREST-INCOME>                                 2316
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     248
<NET-INVESTMENT-INCOME>                           2113
<REALIZED-GAINS-CURRENT>                          (28)
<APPREC-INCREASE-CURRENT>                          627
<NET-CHANGE-FROM-OPS>                             2712
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         2097<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          10059<F1>
<NUMBER-OF-SHARES-REDEEMED>                        492<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           97692
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              188
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    325
<AVERAGE-NET-ASSETS>                             93836<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .22<F1>
<PER-SHARE-GAIN-APPREC>                            .06<F1>
<PER-SHARE-DIVIDEND>                               .22<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.06<F1>
<EXPENSE-RATIO>                                    .59<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 292
   <NAME> THE ONE GROUP WEST VIRGINIA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            94924
<INVESTMENTS-AT-VALUE>                           99437
<RECEIVABLES>                                     1354
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  100794
<PAYABLE-FOR-SECURITIES>                          2622
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          480
<TOTAL-LIABILITIES>                               3102
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         93207
<SHARES-COMMON-STOCK>                               80<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            28
<ACCUM-APPREC-OR-DEPREC>                          4513
<NET-ASSETS>                                     97692
<DIVIDEND-INCOME>                                   45
<INTEREST-INCOME>                                 2316
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     248
<NET-INVESTMENT-INCOME>                           2113
<REALIZED-GAINS-CURRENT>                          (28)
<APPREC-INCREASE-CURRENT>                          627
<NET-CHANGE-FROM-OPS>                             2712
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           11<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             79<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                           97692
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              188
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    325
<AVERAGE-NET-ASSETS>                               502<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .16<F1>
<PER-SHARE-GAIN-APPREC>                            .15<F1>
<PER-SHARE-DIVIDEND>                               .16<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.15<F1>
<EXPENSE-RATIO>                                    .84<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 293
   <NAME> THE ONE GROUP WEST VIRGINIA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            94924
<INVESTMENTS-AT-VALUE>                           99437
<RECEIVABLES>                                     1354
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  100794
<PAYABLE-FOR-SECURITIES>                          2622
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          480
<TOTAL-LIABILITIES>                               3102
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         93207
<SHARES-COMMON-STOCK>                               61<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            28
<ACCUM-APPREC-OR-DEPREC>                          4513
<NET-ASSETS>                                     97692
<DIVIDEND-INCOME>                                   45
<INTEREST-INCOME>                                 2316
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     248
<NET-INVESTMENT-INCOME>                           2113
<REALIZED-GAINS-CURRENT>                          (28)
<APPREC-INCREASE-CURRENT>                          627
<NET-CHANGE-FROM-OPS>                             2712
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            5<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                             61<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                           97692
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              188
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    325
<AVERAGE-NET-ASSETS>                               276<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .14<F1>
<PER-SHARE-GAIN-APPREC>                            .12<F1>
<PER-SHARE-DIVIDEND>                               .14<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.12<F1>
<EXPENSE-RATIO>                                   1.49<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 301
   <NAME> THE ONE GROUP ARIZONA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           243140
<INVESTMENTS-AT-VALUE>                          255769
<RECEIVABLES>                                     5879
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  261651
<PAYABLE-FOR-SECURITIES>                          3051
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1345
<TOTAL-LIABILITIES>                               4396
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        243644
<SHARES-COMMON-STOCK>                            25425<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            982
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         12629
<NET-ASSETS>                                    257255
<DIVIDEND-INCOME>                                   29
<INTEREST-INCOME>                                 6541
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     680
<NET-INVESTMENT-INCOME>                           5890
<REALIZED-GAINS-CURRENT>                           982
<APPREC-INCREASE-CURRENT>                          511
<NET-CHANGE-FROM-OPS>                             7383
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         5879<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          27308<F1>
<NUMBER-OF-SHARES-REDEEMED>                       1883<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                          257255
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              517
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    856
<AVERAGE-NET-ASSETS>                            260035<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .23<F1>
<PER-SHARE-GAIN-APPREC>                            .06<F1>
<PER-SHARE-DIVIDEND>                               .23<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.06<F1>
<EXPENSE-RATIO>                                    .59<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 302
   <NAME> THE ONE GROUP ARIZONA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           243140
<INVESTMENTS-AT-VALUE>                          255769
<RECEIVABLES>                                     5879
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  261651
<PAYABLE-FOR-SECURITIES>                          3051
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1345
<TOTAL-LIABILITIES>                               4396
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        243644
<SHARES-COMMON-STOCK>                              150<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            982
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         12629
<NET-ASSETS>                                    257255
<DIVIDEND-INCOME>                                   29
<INTEREST-INCOME>                                 6541
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     680
<NET-INVESTMENT-INCOME>                           5890
<REALIZED-GAINS-CURRENT>                           982
<APPREC-INCREASE-CURRENT>                          511
<NET-CHANGE-FROM-OPS>                             7383
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           11<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            196<F1>
<NUMBER-OF-SHARES-REDEEMED>                         47<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                          257255
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              517
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    856
<AVERAGE-NET-ASSETS>                               504<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .15<F1>
<PER-SHARE-GAIN-APPREC>                          (.01)<F1>
<PER-SHARE-DIVIDEND>                               .15<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.99<F1>
<EXPENSE-RATIO>                                    .85<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 303
   <NAME> THE ONE GROUP ARIZONA MUNICIPAL BOND FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           243140
<INVESTMENTS-AT-VALUE>                          255769
<RECEIVABLES>                                     5879
<ASSETS-OTHER>                                       3
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  261651
<PAYABLE-FOR-SECURITIES>                          3051
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         1345
<TOTAL-LIABILITIES>                               4396
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        243644
<SHARES-COMMON-STOCK>                                0<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            982
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         12629
<NET-ASSETS>                                    257255
<DIVIDEND-INCOME>                                   29
<INTEREST-INCOME>                                 6541
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     680
<NET-INVESTMENT-INCOME>                           5890
<REALIZED-GAINS-CURRENT>                           982
<APPREC-INCREASE-CURRENT>                          511
<NET-CHANGE-FROM-OPS>                             7383
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                              0<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                          257255
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              517
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    856
<AVERAGE-NET-ASSETS>                                 0<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .09<F1>
<PER-SHARE-GAIN-APPREC>                            .00<F1>
<PER-SHARE-DIVIDEND>                               .00<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                              10.09<F1>
<EXPENSE-RATIO>                                      0<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 351
   <NAME> THE ONE GROUP INVESTOR GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            39084
<INVESTMENTS-AT-VALUE>                           43180
<RECEIVABLES>                                      278
<ASSETS-OTHER>                                      57
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   43515
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          107
<TOTAL-LIABILITIES>                                107
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         39371
<SHARES-COMMON-STOCK>                             2784<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            59
<ACCUM-APPREC-OR-DEPREC>                          4096
<NET-ASSETS>                                     43408
<DIVIDEND-INCOME>                                  302
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      46
<NET-INVESTMENT-INCOME>                            256
<REALIZED-GAINS-CURRENT>                          (59)
<APPREC-INCREASE-CURRENT>                         4096
<NET-CHANGE-FROM-OPS>                             4293
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          227<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           3000<F1>
<NUMBER-OF-SHARES-REDEEMED>                        217<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           43408
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                8
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    145
<AVERAGE-NET-ASSETS>                             24403<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .09<F1>
<PER-SHARE-GAIN-APPREC>                           1.25<F1>
<PER-SHARE-DIVIDEND>                               .09<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.25<F1>
<EXPENSE-RATIO>                                    .20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 352
   <NAME> THE ONE GROUP INVESTOR GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            39084
<INVESTMENTS-AT-VALUE>                           43180
<RECEIVABLES>                                      278
<ASSETS-OTHER>                                      57
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   43515
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          107
<TOTAL-LIABILITIES>                                107
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         39371
<SHARES-COMMON-STOCK>                              396<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            59
<ACCUM-APPREC-OR-DEPREC>                          4096
<NET-ASSETS>                                     43408
<DIVIDEND-INCOME>                                  302
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      46
<NET-INVESTMENT-INCOME>                            256
<REALIZED-GAINS-CURRENT>                          (59)
<APPREC-INCREASE-CURRENT>                         4096
<NET-CHANGE-FROM-OPS>                             4293
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           14<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            397<F1>
<NUMBER-OF-SHARES-REDEEMED>                          2<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           43408
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                8
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    145
<AVERAGE-NET-ASSETS>                              1263<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .07<F1>
<PER-SHARE-GAIN-APPREC>                           1.21<F1>
<PER-SHARE-DIVIDEND>                               .07<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.21<F1>
<EXPENSE-RATIO>                                    .46<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 353
   <NAME> THE ONE GROUP INVESTOR GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            39084
<INVESTMENTS-AT-VALUE>                           43180
<RECEIVABLES>                                      278
<ASSETS-OTHER>                                      57
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   43515
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          107
<TOTAL-LIABILITIES>                                107
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         39371
<SHARES-COMMON-STOCK>                              675<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            59
<ACCUM-APPREC-OR-DEPREC>                          4096
<NET-ASSETS>                                     43408
<DIVIDEND-INCOME>                                  302
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      46
<NET-INVESTMENT-INCOME>                            256
<REALIZED-GAINS-CURRENT>                          (59)
<APPREC-INCREASE-CURRENT>                         4096
<NET-CHANGE-FROM-OPS>                             4293
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           15<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            682<F1>
<NUMBER-OF-SHARES-REDEEMED>                          8<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           43408
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                8
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    145
<AVERAGE-NET-ASSETS>                              2510<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .04<F1>
<PER-SHARE-GAIN-APPREC>                           1.34<F1>
<PER-SHARE-DIVIDEND>                               .04<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.34<F1>
<EXPENSE-RATIO>                                   1.20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 361
   <NAME> THE ONE GROUP INVESTOR GROWTH & INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            52633
<INVESTMENTS-AT-VALUE>                           56466
<RECEIVABLES>                                      473
<ASSETS-OTHER>                                      64
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   57003
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          185
<TOTAL-LIABILITIES>                                185
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         53072
<SHARES-COMMON-STOCK>                             3996<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            87
<ACCUM-APPREC-OR-DEPREC>                          3833
<NET-ASSETS>                                     56818
<DIVIDEND-INCOME>                                  616
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      60
<NET-INVESTMENT-INCOME>                            556
<REALIZED-GAINS-CURRENT>                          (87)
<APPREC-INCREASE-CURRENT>                         3833
<NET-CHANGE-FROM-OPS>                             4302
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          494<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           4443<F1>
<NUMBER-OF-SHARES-REDEEMED>                        448<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           56818
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               10
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    161
<AVERAGE-NET-ASSETS>                             32566<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .15<F1>
<PER-SHARE-GAIN-APPREC>                            .93<F1>
<PER-SHARE-DIVIDEND>                               .15<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.93<F1>
<EXPENSE-RATIO>                                    .20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 362
   <NAME> THE ONE GROUP INVESTOR GROWTH & INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            52633
<INVESTMENTS-AT-VALUE>                           56466
<RECEIVABLES>                                      473
<ASSETS-OTHER>                                      64
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   57003
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          185
<TOTAL-LIABILITIES>                                185
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         53072
<SHARES-COMMON-STOCK>                              387<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            87
<ACCUM-APPREC-OR-DEPREC>                          3833
<NET-ASSETS>                                     56818
<DIVIDEND-INCOME>                                  616
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      60
<NET-INVESTMENT-INCOME>                            556
<REALIZED-GAINS-CURRENT>                          (87)
<APPREC-INCREASE-CURRENT>                         3833
<NET-CHANGE-FROM-OPS>                             4302
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           24<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            443<F1>
<NUMBER-OF-SHARES-REDEEMED>                         57<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           56818
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               10
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    161
<AVERAGE-NET-ASSETS>                              1481<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .12<F1>
<PER-SHARE-GAIN-APPREC>                           1.02<F1>
<PER-SHARE-DIVIDEND>                               .12<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.02<F1>
<EXPENSE-RATIO>                                    .46<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 363
   <NAME> THE ONE GROUP INVESTOR GROWTH & INCOME FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            52633
<INVESTMENTS-AT-VALUE>                           56466
<RECEIVABLES>                                      473
<ASSETS-OTHER>                                      64
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   57003
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          185
<TOTAL-LIABILITIES>                                185
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         53072
<SHARES-COMMON-STOCK>                              808<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            87
<ACCUM-APPREC-OR-DEPREC>                          3833
<NET-ASSETS>                                     56818
<DIVIDEND-INCOME>                                  616
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      60
<NET-INVESTMENT-INCOME>                            556
<REALIZED-GAINS-CURRENT>                          (87)
<APPREC-INCREASE-CURRENT>                         3833
<NET-CHANGE-FROM-OPS>                             4302
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           38<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            811<F1>
<NUMBER-OF-SHARES-REDEEMED>                          5<F1>
<SHARES-REINVESTED>                                  2<F1>
<NET-CHANGE-IN-ASSETS>                           56818
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               10
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    161
<AVERAGE-NET-ASSETS>                              3115<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .09<F1>
<PER-SHARE-GAIN-APPREC>                           1.00<F1>
<PER-SHARE-DIVIDEND>                               .09<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              11.00<F1>
<EXPENSE-RATIO>                                   1.21<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 391
   <NAME> THE ONE GROUP INVESTOR CONSERVATIVE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            18440
<INVESTMENTS-AT-VALUE>                           18901
<RECEIVABLES>                                      150
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   19057
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          104
<TOTAL-LIABILITIES>                                104
<SENIOR-EQUITY>                                    461
<PAID-IN-CAPITAL-COMMON>                         18483
<SHARES-COMMON-STOCK>                             1455<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              9
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           461
<NET-ASSETS>                                     18953
<DIVIDEND-INCOME>                                  352
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      19
<NET-INVESTMENT-INCOME>                            333
<REALIZED-GAINS-CURRENT>                             9
<APPREC-INCREASE-CURRENT>                          461
<NET-CHANGE-FROM-OPS>                              803
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                          296<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           1750<F1>
<NUMBER-OF-SHARES-REDEEMED>                        297<F1>
<SHARES-REINVESTED>                                  2<F1>
<NET-CHANGE-IN-ASSETS>                           18953
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                3
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    114
<AVERAGE-NET-ASSETS>                             11061<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .26<F1>
<PER-SHARE-GAIN-APPREC>                            .33<F1>
<PER-SHARE-DIVIDEND>                               .26<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.33<F1>
<EXPENSE-RATIO>                                    .20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 392
   <NAME> THE ONE GROUP INVESTOR CONSERVATIVE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            18440
<INVESTMENTS-AT-VALUE>                           18901
<RECEIVABLES>                                      150
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   19057
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          104
<TOTAL-LIABILITIES>                                104
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         18483
<SHARES-COMMON-STOCK>                              126<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              9
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           461
<NET-ASSETS>                                     18953
<DIVIDEND-INCOME>                                  352
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      19
<NET-INVESTMENT-INCOME>                            333
<REALIZED-GAINS-CURRENT>                             9
<APPREC-INCREASE-CURRENT>                          461
<NET-CHANGE-FROM-OPS>                              803
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           14<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            128<F1>
<NUMBER-OF-SHARES-REDEEMED>                          3<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           18953
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                3
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    114
<AVERAGE-NET-ASSETS>                               474<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .22<F1>
<PER-SHARE-GAIN-APPREC>                            .32<F1>
<PER-SHARE-DIVIDEND>                               .22<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.32<F1>
<EXPENSE-RATIO>                                    .47<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 393
   <NAME> THE ONE GROUP INVESTOR CONSERVATIVE GROWTH FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            18440
<INVESTMENTS-AT-VALUE>                           18901
<RECEIVABLES>                                      150
<ASSETS-OTHER>                                       6
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   19057
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          104
<TOTAL-LIABILITIES>                                104
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         18483
<SHARES-COMMON-STOCK>                              253<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              9
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           461
<NET-ASSETS>                                     18953
<DIVIDEND-INCOME>                                  352
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      19
<NET-INVESTMENT-INCOME>                            333
<REALIZED-GAINS-CURRENT>                             9
<APPREC-INCREASE-CURRENT>                          461
<NET-CHANGE-FROM-OPS>                              803
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           23<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            254<F1>
<NUMBER-OF-SHARES-REDEEMED>                          3<F1>
<SHARES-REINVESTED>                                  2<F1>
<NET-CHANGE-IN-ASSETS>                           18953
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                3
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    114
<AVERAGE-NET-ASSETS>                               872<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .19<F1>
<PER-SHARE-GAIN-APPREC>                            .33<F1>
<PER-SHARE-DIVIDEND>                               .19<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.33<F1>
<EXPENSE-RATIO>                                   1.21<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 401
   <NAME> THE ONE GROUP INVESTOR BALANCED FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75431
<INVESTMENTS-AT-VALUE>                           79911
<RECEIVABLES>                                      379
<ASSETS-OTHER>                                      34
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   80324
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          321
<TOTAL-LIABILITIES>                                321
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         75590
<SHARES-COMMON-STOCK>                             6790<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            67
<ACCUM-APPREC-OR-DEPREC>                          4480
<NET-ASSETS>                                     80003
<DIVIDEND-INCOME>                                 1261
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      74
<NET-INVESTMENT-INCOME>                           1187
<REALIZED-GAINS-CURRENT>                          (67)
<APPREC-INCREASE-CURRENT>                         4480
<NET-CHANGE-FROM-OPS>                             5600
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         1132<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                           7112<F1>
<NUMBER-OF-SHARES-REDEEMED>                        324<F1>
<SHARES-REINVESTED>                                  2<F1>
<NET-CHANGE-IN-ASSETS>                           80003
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               16
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    189
<AVERAGE-NET-ASSETS>                             53670<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .21<F1>
<PER-SHARE-GAIN-APPREC>                            .63<F1>
<PER-SHARE-DIVIDEND>                               .21<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.63<F1>
<EXPENSE-RATIO>                                    .20<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 402
   <NAME> THE ONE GROUP INVESTOR BALANCED FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75431
<INVESTMENTS-AT-VALUE>                           79911
<RECEIVABLES>                                      379
<ASSETS-OTHER>                                      34
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   80324
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          321
<TOTAL-LIABILITIES>                                321
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         75590
<SHARES-COMMON-STOCK>                              204<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            67
<ACCUM-APPREC-OR-DEPREC>                          4480
<NET-ASSETS>                                     80003
<DIVIDEND-INCOME>                                 1261
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      74
<NET-INVESTMENT-INCOME>                           1187
<REALIZED-GAINS-CURRENT>                          (67)
<APPREC-INCREASE-CURRENT>                         4480
<NET-CHANGE-FROM-OPS>                             5600
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           15<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            203<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  1<F1>
<NET-CHANGE-IN-ASSETS>                           80003
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               16
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    189
<AVERAGE-NET-ASSETS>                               615<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .17<F1>
<PER-SHARE-GAIN-APPREC>                            .66<F1>
<PER-SHARE-DIVIDEND>                               .17<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.66<F1>
<EXPENSE-RATIO>                                    .47<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 403
   <NAME> THE ONE GROUP INVESTOR BALANCED FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   7-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             DEC-10-1996
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                            75431
<INVESTMENTS-AT-VALUE>                           79911
<RECEIVABLES>                                      379
<ASSETS-OTHER>                                      34
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   80324
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          321
<TOTAL-LIABILITIES>                                321
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                         75590
<SHARES-COMMON-STOCK>                              533<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                            67
<ACCUM-APPREC-OR-DEPREC>                          4480
<NET-ASSETS>                                     80003
<DIVIDEND-INCOME>                                 1261
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      74
<NET-INVESTMENT-INCOME>                           1187
<REALIZED-GAINS-CURRENT>                          (67)
<APPREC-INCREASE-CURRENT>                         4480
<NET-CHANGE-FROM-OPS>                             5600
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           40<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                            535<F1>
<NUMBER-OF-SHARES-REDEEMED>                          4<F1>
<SHARES-REINVESTED>                                  2<F1>
<NET-CHANGE-IN-ASSETS>                           80003
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               16
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    189
<AVERAGE-NET-ASSETS>                              2128<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .16<F1>
<PER-SHARE-GAIN-APPREC>                            .65<F1>
<PER-SHARE-DIVIDEND>                               .16<F1>
<PER-SHARE-DISTRIBUTIONS>                            0<F1>
<RETURNS-OF-CAPITAL>                                 0<F1>
<PER-SHARE-NAV-END>                              10.65<F1>
<EXPENSE-RATIO>                                   1.22<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 411
   <NAME> THE ONE GROUP TREASURY & AGENCY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           108064
<INVESTMENTS-AT-VALUE>                          109632
<RECEIVABLES>                                     1290
<ASSETS-OTHER>                                       5
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  110927
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          669
<TOTAL-LIABILITIES>                                669
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        108512
<SHARES-COMMON-STOCK>                            11024<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            178
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          1568
<NET-ASSETS>                                    110258
<DIVIDEND-INCOME>                                    9
<INTEREST-INCOME>                                 3404
<OTHER-INCOME>                                       7
<EXPENSES-NET>                                     224
<NET-INVESTMENT-INCOME>                           3196
<REALIZED-GAINS-CURRENT>                           178
<APPREC-INCREASE-CURRENT>                        (341)
<NET-CHANGE-FROM-OPS>                             3033
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         3196<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                          11951<F1>
<NUMBER-OF-SHARES-REDEEMED>                        927<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                          110258
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              198
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    391
<AVERAGE-NET-ASSETS>                            112458<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .28<F1>
<PER-SHARE-GAIN-APPREC>                          (.01)<F1>
<PER-SHARE-DIVIDEND>                               .28<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.99<F1>
<EXPENSE-RATIO>                                    .45<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>FIDUCIARY CLASS
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 412
   <NAME> THE ONE GROUP TREASURY & AGENCY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           108064
<INVESTMENTS-AT-VALUE>                          109632
<RECEIVABLES>                                     1290
<ASSETS-OTHER>                                       5
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  110927
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          669
<TOTAL-LIABILITIES>                                669
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        108512
<SHARES-COMMON-STOCK>                                9<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            178
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          1568
<NET-ASSETS>                                    110258
<DIVIDEND-INCOME>                                    9
<INTEREST-INCOME>                                 3404
<OTHER-INCOME>                                       7
<EXPENSES-NET>                                     224
<NET-INVESTMENT-INCOME>                           3196
<REALIZED-GAINS-CURRENT>                           178
<APPREC-INCREASE-CURRENT>                        (341)
<NET-CHANGE-FROM-OPS>                             3033
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                              9<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                          110258
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              198
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    391
<AVERAGE-NET-ASSETS>                                12<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .29<F1>
<PER-SHARE-GAIN-APPREC>                          (.02)<F1>
<PER-SHARE-DIVIDEND>                               .29<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.98<F1>
<EXPENSE-RATIO>                                    .71<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS A
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000763852
<NAME> THE ONE GROUP FAMILY OF MUTUAL FUNDS
<SERIES>
   <NUMBER> 413
   <NAME> THE ONE GROUP TREASURY & AGENCY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JAN-21-1997
<PERIOD-END>                               JUN-30-1997
<INVESTMENTS-AT-COST>                           108064
<INVESTMENTS-AT-VALUE>                          109632
<RECEIVABLES>                                     1290
<ASSETS-OTHER>                                       5
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  110927
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          669
<TOTAL-LIABILITIES>                                669
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        108512
<SHARES-COMMON-STOCK>                                8<F1>
<SHARES-COMMON-PRIOR>                                0<F1>
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                            178
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                          1568
<NET-ASSETS>                                    110258
<DIVIDEND-INCOME>                                    9
<INTEREST-INCOME>                                 3404
<OTHER-INCOME>                                       7
<EXPENSES-NET>                                     224
<NET-INVESTMENT-INCOME>                           3196
<REALIZED-GAINS-CURRENT>                           178
<APPREC-INCREASE-CURRENT>                        (341)
<NET-CHANGE-FROM-OPS>                             3033
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0<F1>
<DISTRIBUTIONS-OF-GAINS>                             0<F1>
<DISTRIBUTIONS-OTHER>                                0<F1>
<NUMBER-OF-SHARES-SOLD>                              8<F1>
<NUMBER-OF-SHARES-REDEEMED>                          0<F1>
<SHARES-REINVESTED>                                  0<F1>
<NET-CHANGE-IN-ASSETS>                          110258
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              198
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    391
<AVERAGE-NET-ASSETS>                                 5<F1>
<PER-SHARE-NAV-BEGIN>                            10.00<F1>
<PER-SHARE-NII>                                    .26<F1>
<PER-SHARE-GAIN-APPREC>                          (.01)<F1>
<PER-SHARE-DIVIDEND>                               .26<F1>
<PER-SHARE-DISTRIBUTIONS>                          .00<F1>
<RETURNS-OF-CAPITAL>                               .00<F1>
<PER-SHARE-NAV-END>                               9.99<F1>
<EXPENSE-RATIO>                                   1.23<F1>
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
<FN>
<F1>CLASS B
</FN>
        

</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission