<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> 61
<NAME> TARGET 2020 FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-1999
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 203,405,074
<INVESTMENTS-AT-VALUE> 263,792,146
<RECEIVABLES> 0
<ASSETS-OTHER> 6,619
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 263,798,765
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,320,703
<TOTAL-LIABILITIES> 1,320,703
<SENIOR-EQUITY> 77,677
<PAID-IN-CAPITAL-COMMON> 187,809,675
<SHARES-COMMON-STOCK> 7,767,732
<SHARES-COMMON-PRIOR> 10,347,549
<ACCUMULATED-NII-CURRENT> 3,700,028
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 10,503,610
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 60,387,072
<NET-ASSETS> 262,478,062
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 8,880,964
<OTHER-INCOME> 58,669
<EXPENSES-NET> 843,185
<NET-INVESTMENT-INCOME> 8,096,448
<REALIZED-GAINS-CURRENT> 10,837,120
<APPREC-INCREASE-CURRENT> 6,724,021
<NET-CHANGE-FROM-OPS> 25,657,589
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 17,675,576
<DISTRIBUTIONS-OF-GAINS> 31,488,441
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,728,760
<NUMBER-OF-SHARES-REDEEMED> 10,147,827
<SHARES-REINVESTED> 1,839,250
<NET-CHANGE-IN-ASSETS> (54,802,757)
<ACCUMULATED-NII-PRIOR> 19,544,059
<ACCUMULATED-GAINS-PRIOR> 23,452,379
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 836,382
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 843,185
<AVERAGE-NET-ASSETS> 285,205,260
<PER-SHARE-NAV-BEGIN> 30.61
<PER-SHARE-NII> 0.88
<PER-SHARE-GAIN-APPREC> 2.23
<PER-SHARE-DIVIDEND> 1.85
<PER-SHARE-DISTRIBUTIONS> 3.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 33.72
<EXPENSE-RATIO> 0.59
</TABLE>
