<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> 31
<NAME> TARGET 2005 - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 299,749,813
<INVESTMENTS-AT-VALUE> 293,353,797
<RECEIVABLES> 0
<ASSETS-OTHER> 351,486
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 293,705,283
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 267,382
<TOTAL-LIABILITIES> 267,382
<SENIOR-EQUITY> 39,564
<PAID-IN-CAPITAL-COMMON> 305,012,603
<SHARES-COMMON-STOCK> 3,956,418
<SHARES-COMMON-PRIOR> 6,757,051
<ACCUMULATED-NII-CURRENT> 5,321,688
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (10,539,938)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (6,396,015)
<NET-ASSETS> 293,437,901
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 13,187,193
<OTHER-INCOME> 0
<EXPENSES-NET> 1,267,114
<NET-INVESTMENT-INCOME> 11,920,079
<REALIZED-GAINS-CURRENT> (9,573,157)
<APPREC-INCREASE-CURRENT> (184,546)
<NET-CHANGE-FROM-OPS> 2,162,376
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 25,001,055
<DISTRIBUTIONS-OF-GAINS> 10,024,151
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,318,133
<NUMBER-OF-SHARES-REDEEMED> (4,632,488)
<SHARES-REINVESTED> 513,722
<NET-CHANGE-IN-ASSETS> (199,343,661)
<ACCUMULATED-NII-PRIOR> 16,898,403
<ACCUMULATED-GAINS-PRIOR> 104,518,429
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,252,918
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,267,114
<AVERAGE-NET-ASSETS> 426,127,922
<PER-SHARE-NAV-BEGIN> 72.55
<PER-SHARE-NII> 2.01
<PER-SHARE-GAIN-APPREC> (1.11)
<PER-SHARE-DIVIDEND> 3.89
<PER-SHARE-DISTRIBUTIONS> 1.56
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 73.45
<EXPENSE-RATIO> 0.59
</TABLE>