<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.

<CIK> 0000717316
<NAME> AMERICAN CENTURY CALIFORNIA TAX-FREE & MUNICIPAL FUNDS

   <NUMBER> 51
   <NAME> CALIFORNIA HIGH-YIELD MUNICIPAL FUND

                                           
<PERIOD-TYPE>                                     YEAR
<FISCAL-YEAR-END>                                 AUG-31-2000
<PERIOD-END>                                      AUG-31-2000
<INVESTMENTS-AT-COST>                                          305,001,000
<INVESTMENTS-AT-VALUE>                                         314,919,435
<RECEIVABLES>                                                    6,266,425
<ASSETS-OTHER>                                                           0
<OTHER-ITEMS-ASSETS>                                                     0
<TOTAL-ASSETS>                                                 321,185,860
<PAYABLE-FOR-SECURITIES>                                                 0
<SENIOR-LONG-TERM-DEBT>                                                  0
<OTHER-ITEMS-LIABILITIES>                                        2,988,599
<TOTAL-LIABILITIES>                                              2,988,599
<SENIOR-EQUITY>                                                    337,221
<PAID-IN-CAPITAL-COMMON>                                       319,491,098
<SHARES-COMMON-STOCK>                                           33,722,081
<SHARES-COMMON-PRIOR>                                           32,866,910
<ACCUMULATED-NII-CURRENT>                                      (11,549,493)
<OVERDISTRIBUTION-NII>                                                   0
<ACCUMULATED-NET-GAINS>                                          9,918,435
<OVERDISTRIBUTION-GAINS>                                                 0
<ACCUM-APPREC-OR-DEPREC>                                                 0
<NET-ASSETS>                                                   318,197,261
<DIVIDEND-INCOME>                                                        0
<INTEREST-INCOME>                                               19,104,041
<OTHER-INCOME>                                                           0
<EXPENSES-NET>                                                   1,671,403
<NET-INVESTMENT-INCOME>                                         17,432,638
<REALIZED-GAINS-CURRENT>                                        (8,233,096)
<APPREC-INCREASE-CURRENT>                                        9,780,323
<NET-CHANGE-FROM-OPS>                                           18,979,865
<EQUALIZATION>                                                           0
<DISTRIBUTIONS-OF-INCOME>                                      (17,432,638)
<DISTRIBUTIONS-OF-GAINS>                                                 0
<DISTRIBUTIONS-OTHER>                                                    0
<NUMBER-OF-SHARES-SOLD>                                         18,974,933
<NUMBER-OF-SHARES-REDEEMED>                                    (23,142,289)
<SHARES-REINVESTED>                                              1,348,647
<NET-CHANGE-IN-ASSETS>                                         (23,771,016)
<ACCUMULATED-NII-PRIOR>                                         (9,644,053)
<ACCUMULATED-GAINS-PRIOR>                                                0
<OVERDISTRIB-NII-PRIOR>                                                  0
<OVERDIST-NET-GAINS-PRIOR>                                               0
<GROSS-ADVISORY-FEES>                                            1,660,548
<INTEREST-EXPENSE>                                                       0
<GROSS-EXPENSE>                                                  1,671,403
<AVERAGE-NET-ASSETS>                                           308,998,211
<PER-SHARE-NAV-BEGIN>                                                 9.36
<PER-SHARE-NII>                                                       0.52
<PER-SHARE-GAIN-APPREC>                                               0.08
<PER-SHARE-DIVIDEND>                                                  0.00
<PER-SHARE-DISTRIBUTIONS>                                            (0.52)
<RETURNS-OF-CAPITAL>                                                  0.00
<PER-SHARE-NAV-END>                                                   9.44
<EXPENSE-RATIO>                                                       0.54