<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE ANNUAL REPORT OF AMERICAN CENTURY GOVERNMENT INCOME TRUST
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000773674
<NAME> AMERICAN CENTURY GOVERNMENT INCOME TRUST
<SERIES>
<NUMBER> 73
<NAME> INFLATION-ADJUSTED TREASURY FUND-ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 18,615,965
<INVESTMENTS-AT-VALUE> 18,561,959
<RECEIVABLES> 187,126
<ASSETS-OTHER> 52,239
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 18,801,324
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 13,901
<TOTAL-LIABILITIES> 13,901
<SENIOR-EQUITY> 189
<PAID-IN-CAPITAL-COMMON> 19,032,359
<SHARES-COMMON-STOCK> 18,869
<SHARES-COMMON-PRIOR> 2,228
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (191,119)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (54,006)
<NET-ASSETS> 18,787,423
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 959,658
<OTHER-INCOME> 0
<EXPENSES-NET> 74,506
<NET-INVESTMENT-INCOME> 885,152
<REALIZED-GAINS-CURRENT> (120,522)
<APPREC-INCREASE-CURRENT> 109,626
<NET-CHANGE-FROM-OPS> 874,256
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4,092)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 22,770
<NUMBER-OF-SHARES-REDEEMED> (5,410)
<SHARES-REINVESTED> 429
<NET-CHANGE-IN-ASSETS> 9,796,762
<ACCUMULATED-NII-PRIOR> (70,597)
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 73,712
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 74,506
<AVERAGE-NET-ASSETS> 74,620
<PER-SHARE-NAV-BEGIN> 9.48
<PER-SHARE-NII> 0.56
<PER-SHARE-GAIN-APPREC> (0.07)
<PER-SHARE-DIVIDEND> (0.56)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.41
<EXPENSE-RATIO> 0.76
</TABLE>
