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SIGNATURE PETER G. ROBB
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<PAGE>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SECOND
QUARTER REPORT DATED JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-START> JAN-01-1997
<PERIOD-END> JUN-30-1997
<INVESTMENTS-AT-COST> 13753389
<INVESTMENTS-AT-VALUE> 24729860
<RECEIVABLES> 148629
<ASSETS-OTHER> (4718)
<OTHER-ITEMS-ASSETS> 725665
<TOTAL-ASSETS> 25599435
<PAYABLE-FOR-SECURITIES> 500000
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13255
<TOTAL-LIABILITIES> 513255
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 13895417
<SHARES-COMMON-STOCK> 297871
<SHARES-COMMON-PRIOR> 279116
<ACCUMULATED-NII-CURRENT> 3281
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 152020
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2916189
<NET-ASSETS> 25086180
<DIVIDEND-INCOME> 203822
<INTEREST-INCOME> 222284
<OTHER-INCOME> 0
<EXPENSES-NET> (108912)
<NET-INVESTMENT-INCOME> 317194
<REALIZED-GAINS-CURRENT> 152020
<APPREC-INCREASE-CURRENT> 2916189
<NET-CHANGE-FROM-OPS> 1145945
<EQUALIZATION> 6679
<DISTRIBUTIONS-OF-INCOME> (320592)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 25607
<NUMBER-OF-SHARES-REDEEMED> (9877)
<SHARES-REINVESTED> 3025
<NET-CHANGE-IN-ASSETS> 4521166
<ACCUMULATED-NII-PRIOR> 70526
<ACCUMULATED-GAINS-PRIOR> (11531)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 68659
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 108912
<AVERAGE-NET-ASSETS> 22564375
<PER-SHARE-NAV-BEGIN> 73.68
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<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (1.10)
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<AVG-DEBT-PER-SHARE> 0
</TABLE>
<PAGE>
77.C. Exhibit Incorporated By Reference
1. Mairs and Power Balanced Fund, Inc., 2nd Quarter Report dated
June 30, 1997, page 6, Supplementary Information, filed August 21,
1997. Incorporated by reference to registrants Semi-Annual Report
for Registered Investment Companies on Form N-SAR.
