<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE ANNUAL REPORT OF AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL
FUNDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS
<SERIES>
<NUMBER> 21
<NAME> CALIFORNIA MUNICIPAL MONEY MARKET
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> AUG-31-2000
<PERIOD-END> AUG-31-2000
<INVESTMENTS-AT-COST> 183,745,624
<INVESTMENTS-AT-VALUE> 183,745,624
<RECEIVABLES> 0
<ASSETS-OTHER> 1,099,367
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 184,844,991
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 6,316,561
<TOTAL-LIABILITIES> 6,316,561
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 178,564,963
<SHARES-COMMON-STOCK> 178,564,963
<SHARES-COMMON-PRIOR> 194,537,655
<ACCUMULATED-NII-CURRENT> 122,436
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (158,044)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 178,528,430
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 7,048,106
<OTHER-INCOME> 0
<EXPENSES-NET> 962,396
<NET-INVESTMENT-INCOME> 6,085,710
<REALIZED-GAINS-CURRENT> 92
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 6,085,802
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6,085,710)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 191,753,071
<NUMBER-OF-SHARES-REDEEMED> (198,623,041)
<SHARES-REINVESTED> 5,413,729
<NET-CHANGE-IN-ASSETS> (1,456,149)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 122,436
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 956,050
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 962,396
<AVERAGE-NET-ASSETS> 194,429,349
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.03)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.49
</TABLE>
