<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE SEMI-ANNUAL REPORT OF AMERICAN CENTURY TARGET
MATURITIES TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH REPORT.
</LEGEND>
<CIK> 0000757928
<NAME> AMERICAN CENTURY TARGET MATURITIES TRUST
<SERIES>
<NUMBER> 51
<NAME> TARGET 2015 FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 108,962,651
<INVESTMENTS-AT-VALUE> 129,726,837
<RECEIVABLES> 0
<ASSETS-OTHER> 1,803,896
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 131,530,733
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 64,383
<TOTAL-LIABILITIES> 64,383
<SENIOR-EQUITY> 28,704
<PAID-IN-CAPITAL-COMMON> 110,831,541
<SHARES-COMMON-STOCK> 2,870,350
<SHARES-COMMON-PRIOR> 5,069,339
<ACCUMULATED-NII-CURRENT> 2,348,531
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,506,612)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 20,764,186
<NET-ASSETS> 131,466,350
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6,107,688
<OTHER-INCOME> 0
<EXPENSES-NET> 551,845
<NET-INVESTMENT-INCOME> 5,555,843
<REALIZED-GAINS-CURRENT> (1,155,697)
<APPREC-INCREASE-CURRENT> 3,823,980
<NET-CHANGE-FROM-OPS> 8,224,126
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 12,201,171
<DISTRIBUTIONS-OF-GAINS> 136,592
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,702,278
<NUMBER-OF-SHARES-REDEEMED> (4,198,779)
<SHARES-REINVESTED> 297,512
<NET-CHANGE-IN-ASSETS> (86,734,160)
<ACCUMULATED-NII-PRIOR> 5,500,951
<ACCUMULATED-GAINS-PRIOR> 1,035,560
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 548,501
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 551,845
<AVERAGE-NET-ASSETS> 187,385,935
<PER-SHARE-NAV-BEGIN> 43.04
<PER-SHARE-NII> 1.27
<PER-SHARE-GAIN-APPREC> 1.48
<PER-SHARE-DIVIDEND> 2.46
<PER-SHARE-DISTRIBUTIONS> 0.03
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 45.79
<EXPENSE-RATIO> 0.59
</TABLE>