<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> 61
<NAME> CALIFORNIA INSURED TAX-FREE FUND
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> AUG-31-2000
<PERIOD-END> AUG-31-2000
<INVESTMENTS-AT-COST> 188,699,671
<INVESTMENTS-AT-VALUE> 196,325,244
<RECEIVABLES> 4,132,237
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 200,457,481
<PAYABLE-FOR-SECURITIES> 949,124
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 835,413
<TOTAL-LIABILITIES> 1,784,537
<SENIOR-EQUITY> 196,211
<PAID-IN-CAPITAL-COMMON> 192,653,316
<SHARES-COMMON-STOCK> 19,621,139
<SHARES-COMMON-PRIOR> 20,252,426
<ACCUMULATED-NII-CURRENT> (1,802,156)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 7,625,573
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 198,672,944
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,182,751
<OTHER-INCOME> 0
<EXPENSES-NET> 1,013,819
<NET-INVESTMENT-INCOME> 10,168,932
<REALIZED-GAINS-CURRENT> (1,412,516)
<APPREC-INCREASE-CURRENT> 5,695,420
<NET-CHANGE-FROM-OPS> 14,451,836
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10,168,932)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,847,868
<NUMBER-OF-SHARES-REDEEMED> (8,371,917)
<SHARES-REINVESTED> 703,467
<NET-CHANGE-IN-ASSETS> (13,264,468)
<ACCUMULATED-NII-PRIOR> (1,744,540)
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,006,819
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,013,819
<AVERAGE-NET-ASSETS> 198,435,845
<PER-SHARE-NAV-BEGIN> 9.88
<PER-SHARE-NII> 0.50
<PER-SHARE-GAIN-APPREC> 0.25
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (0.50)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.13
<EXPENSE-RATIO> 0.51
</TABLE>
