WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000763852
<NAME> ONE GROUP MUTUAL FUNDS
<SERIES>
<NUMBER> 102
<NAME> PRIME MONEY MARKET FUND
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
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<PERIOD-START> JUL-01-1999
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<INVESTMENTS-AT-VALUE> 9729382
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<OTHER-ITEMS-LIABILITIES> 54654
<TOTAL-LIABILITIES> 54654
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<ACCUMULATED-NII-PRIOR> 266
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<EXPENSE-RATIO> 0.77
<FN>
<F1>Class A
</TABLE>
