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<PAGE> PAGE 11
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<PAGE> PAGE 15
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<PAGE> PAGE 19
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<PAGE> PAGE 21
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064 A000600 N
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070 A010600 Y
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<PAGE> PAGE 22
070 D020600 N
070 E010600 N
070 E020600 N
070 F010600 N
070 F020600 N
070 G010600 N
070 G020600 N
070 H010600 N
070 H020600 N
070 I010600 N
070 I020600 N
070 J010600 Y
070 J020600 N
070 K010600 Y
070 K020600 N
070 L010600 N
070 L020600 N
070 M010600 N
070 M020600 N
070 N010600 Y
070 N020600 N
070 O010600 Y
070 O020600 N
070 P010600 Y
070 P020600 N
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070 Q020600 N
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070 R020600 N
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<PAGE> PAGE 23
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<PAGE> PAGE 24
076 000600 0.00
028 A010700 839
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028 B030700 0
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<PAGE> PAGE 25
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063 A000700 0
063 B000700 12.1
064 A000700 N
064 B000700 N
070 A010700 Y
070 A020700 N
070 B010700 N
070 B020700 N
070 C010700 N
070 C020700 N
070 D010700 N
070 D020700 N
070 E010700 N
070 E020700 N
070 F010700 N
070 F020700 N
070 G010700 N
070 G020700 N
070 H010700 N
070 H020700 N
070 I010700 N
070 I020700 N
070 J010700 Y
070 J020700 N
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070 K020700 N
070 L010700 N
070 L020700 N
070 M010700 N
070 M020700 N
070 N010700 Y
070 N020700 N
070 O010700 Y
070 O020700 N
070 P010700 Y
<PAGE> PAGE 26
070 P020700 N
070 Q010700 N
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<PAGE> PAGE 27
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028 A010800 213172
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<PAGE> PAGE 28
028 F040800 193030
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<PAGE> PAGE 29
070 C010800 N
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070 F010800 N
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070 G010800 N
070 G020800 N
070 H010800 N
070 H020800 N
070 I010800 N
070 I020800 N
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070 J020800 N
070 K010800 Y
070 K020800 N
070 L010800 N
070 L020800 N
070 M010800 N
070 M020800 N
070 N010800 N
070 N020800 N
070 O010800 Y
070 O020800 N
070 P010800 Y
070 P020800 N
070 Q010800 N
070 Q020800 N
070 R010800 N
070 R020800 N
071 A000800 0
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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SIGNATURE MARYANNE ROEPKE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 11
<NAME> GNMA FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 1,405,486,581
<INVESTMENTS-AT-VALUE> 1,383,827,452
<RECEIVABLES> 9,088,524
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<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,392,915,976
<PAYABLE-FOR-SECURITIES> 28,724,349
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<OTHER-ITEMS-LIABILITIES> 2,592,516
<TOTAL-LIABILITIES> 31,316,865
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,410,202,897
<SHARES-COMMON-STOCK> 131,456,638
<SHARES-COMMON-PRIOR> 133,308,318
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (26,944,657)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (21,659,129)
<NET-ASSETS> 1,361,599,111
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 47,646,406
<OTHER-INCOME> 0
<EXPENSES-NET> 4,113,469
<NET-INVESTMENT-INCOME> 43,532,937
<REALIZED-GAINS-CURRENT> (5,387,902)
<APPREC-INCREASE-CURRENT> (38,664,372)
<NET-CHANGE-FROM-OPS> (519,337)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 43,289,219
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 21,081,844
<NUMBER-OF-SHARES-REDEEMED> 26,283,988
<SHARES-REINVESTED> 3,350,464
<NET-CHANGE-IN-ASSETS> (60,917,610)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (21,556,755)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,070,491
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,113,469
<AVERAGE-NET-ASSETS> 1,384,664,076
<PER-SHARE-NAV-BEGIN> 10.62
<PER-SHARE-NII> 0.32
<PER-SHARE-GAIN-APPREC> (0.33)
<PER-SHARE-DIVIDEND> 0.32
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.29
<EXPENSE-RATIO> 0.59
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 13
<NAME> GNMA FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 1,405,486,581
<INVESTMENTS-AT-VALUE> 1,383,827,452
<RECEIVABLES> 9,088,524
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,392,915,976
<PAYABLE-FOR-SECURITIES> 28,724,349
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,592,516
<TOTAL-LIABILITIES> 31,316,865
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,410,202,897
<SHARES-COMMON-STOCK> 811,797
<SHARES-COMMON-PRIOR> 650,709
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (26,944,657)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (21,659,129)
<NET-ASSETS> 1,361,599,111
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 47,646,406
<OTHER-INCOME> 0
<EXPENSES-NET> 4,113,469
<NET-INVESTMENT-INCOME> 43,532,937
<REALIZED-GAINS-CURRENT> (5,387,902)
<APPREC-INCREASE-CURRENT> (38,664,372)
<NET-CHANGE-FROM-OPS> (519,337)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 243,718
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 507,677
<NUMBER-OF-SHARES-REDEEMED> 366,374
<SHARES-REINVESTED> 19,785
<NET-CHANGE-IN-ASSETS> (60,917,610)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (21,556,755)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,070,491
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,113,469
<AVERAGE-NET-ASSETS> 1,384,664,076
<PER-SHARE-NAV-BEGIN> 10.62
<PER-SHARE-NII> 0.31
<PER-SHARE-GAIN-APPREC> (0.33)
<PER-SHARE-DIVIDEND> 0.31
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.29
<EXPENSE-RATIO> 0.84
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 21
<NAME> INTERMEDIATE-TERM TREASURY FUND-INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 388,259,269
<INVESTMENTS-AT-VALUE> 376,986,106
<RECEIVABLES> 6,611,656
<ASSETS-OTHER> 2,892
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 383,600,654
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,857,618
<TOTAL-LIABILITIES> 3,857,618
<SENIOR-EQUITY> 362,617
<PAID-IN-CAPITAL-COMMON> 395,056,006
<SHARES-COMMON-STOCK> 36,261,682
<SHARES-COMMON-PRIOR> 41,677,529
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,402,424)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (11,273,163)
<NET-ASSETS> 379,743,036
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,011,397
<OTHER-INCOME> 0
<EXPENSES-NET> 1,048,297
<NET-INVESTMENT-INCOME> 9,963,100
<REALIZED-GAINS-CURRENT> (6,168,826)
<APPREC-INCREASE-CURRENT> (5,055,767)
<NET-CHANGE-FROM-OPS> (1,261,493)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 9,745,837
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 12,388,593
<NUMBER-OF-SHARES-REDEEMED> 18,632,613
<SHARES-REINVESTED> 828,173
<NET-CHANGE-IN-ASSETS> (61,868,618)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1,766,402
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,018,287
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,048,297
<AVERAGE-NET-ASSETS> 398,113,941
<PER-SHARE-NAV-BEGIN> 10.45
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> (0.27)
<PER-SHARE-DIVIDEND> 0.25
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.18
<EXPENSE-RATIO> 0.51
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 23
<NAME> INTERMEDIATE-TERM TREASURY FUND-ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 388,259,269
<INVESTMENTS-AT-VALUE> 376,986,106
<RECEIVABLES> 6,611,656
<ASSETS-OTHER> 2,892
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 383,600,654
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,857,618
<TOTAL-LIABILITIES> 3,857,618
<SENIOR-EQUITY> 10,522
<PAID-IN-CAPITAL-COMMON> 395,408,101
<SHARES-COMMON-STOCK> 1,052,219
<SHARES-COMMON-PRIOR> 585,453
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,402,424)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (11,273,163)
<NET-ASSETS> 379,743,036
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,011,397
<OTHER-INCOME> 0
<EXPENSES-NET> 1,048,297
<NET-INVESTMENT-INCOME> 9,963,100
<REALIZED-GAINS-CURRENT> (6,168,826)
<APPREC-INCREASE-CURRENT> (5,055,767)
<NET-CHANGE-FROM-OPS> (1,261,493)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 217,263
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 612,133
<NUMBER-OF-SHARES-REDEEMED> 163,877
<SHARES-REINVESTED> 18,510
<NET-CHANGE-IN-ASSETS> (61,868,618)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 1,766,402
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,018,287
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,048,297
<AVERAGE-NET-ASSETS> 9,285,171
<PER-SHARE-NAV-BEGIN> 10.45
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> (0.27)
<PER-SHARE-DIVIDEND> 0.24
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.18
<EXPENSE-RATIO> 0.76
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 31
<NAME> GOVERNMENT AGENCY MONEY MARKET FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 531,941,071
<INVESTMENTS-AT-VALUE> 531,941,071
<RECEIVABLES> 2,760,932
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 534,702,003
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,864,284
<TOTAL-LIABILITIES> 1,864,284
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 532,837,446
<SHARES-COMMON-STOCK> 531,389,539
<SHARES-COMMON-PRIOR> 527,842,001
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 273
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 532,837,719
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 13,152,723
<OTHER-INCOME> 0
<EXPENSES-NET> 1,248,961
<NET-INVESTMENT-INCOME> 11,903,762
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 11,904,035
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 11,860,873
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 199,835,576
<NUMBER-OF-SHARES-REDEEMED> 207,705,710
<SHARES-REINVESTED> 11,417,672
<NET-CHANGE-IN-ASSETS> 4,995,718
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,236,599
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,248,961
<AVERAGE-NET-ASSETS> 521,542,989
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.02
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.47
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 33
<NAME> GOVERNMENT AGENCY MONEY MARKET FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 531,941,071
<INVESTMENTS-AT-VALUE> 531,941,071
<RECEIVABLES> 2,760,932
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 534,702,003
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,864,284
<TOTAL-LIABILITIES> 1,864,284
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 532,837,446
<SHARES-COMMON-STOCK> 1,447,907
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 273
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 532,837,719
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 13,152,723
<OTHER-INCOME> 0
<EXPENSES-NET> 1,248,961
<NET-INVESTMENT-INCOME> 11,903,762
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 11,904,035
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 42,889
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 11,035,651
<NUMBER-OF-SHARES-REDEEMED> 9,630,657
<SHARES-REINVESTED> 42,913
<NET-CHANGE-IN-ASSETS> 4,995,718
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,236,599
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,248,961
<AVERAGE-NET-ASSETS> 2,125,507
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.02
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.72
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 51
<NAME> SHORT-TERM TREASURY FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 69,833,857
<INVESTMENTS-AT-VALUE> 69,173,068
<RECEIVABLES> 1,582,688
<ASSETS-OTHER> 155,004
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 70,910,760
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 86,387
<TOTAL-LIABILITIES> 86,387
<SENIOR-EQUITY> 69,105
<PAID-IN-CAPITAL-COMMON> 71,346,045
<SHARES-COMMON-STOCK> 6,910,544
<SHARES-COMMON-PRIOR> 6,275,316
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 70,012
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (660,789)
<NET-ASSETS> 70,824,373
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,741,302
<OTHER-INCOME> 0
<EXPENSES-NET> 175,032
<NET-INVESTMENT-INCOME> 1,566,270
<REALIZED-GAINS-CURRENT> 49,039
<APPREC-INCREASE-CURRENT> (763,570)
<NET-CHANGE-FROM-OPS> 851,739
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1,496,657
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,809,703
<NUMBER-OF-SHARES-REDEEMED> 1,299,642
<SHARES-REINVESTED> 125,167
<NET-CHANGE-IN-ASSETS> 5,939,342
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 20,973
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 166,123
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 175,032
<AVERAGE-NET-ASSETS> 64,131,400
<PER-SHARE-NAV-BEGIN> 9.85
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> (0.11)
<PER-SHARE-DIVIDEND> 0.23
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.74
<EXPENSE-RATIO> 0.51
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 53
<NAME> SHORT-TERM TREASURY FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 69,833,857
<INVESTMENTS-AT-VALUE> 69,173,068
<RECEIVABLES> 1,582,688
<ASSETS-OTHER> 155,004
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 70,910,760
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 86,387
<TOTAL-LIABILITIES> 86,387
<SENIOR-EQUITY> 3,622
<PAID-IN-CAPITAL-COMMON> 71,411,528
<SHARES-COMMON-STOCK> 362,231
<SHARES-COMMON-PRIOR> 315,062
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 70,012
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (660,789)
<NET-ASSETS> 70,824,373
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,741,302
<OTHER-INCOME> 0
<EXPENSES-NET> 175,032
<NET-INVESTMENT-INCOME> 1,566,270
<REALIZED-GAINS-CURRENT> 49,039
<APPREC-INCREASE-CURRENT> (763,570)
<NET-CHANGE-FROM-OPS> 851,739
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 69,613
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 310,681
<NUMBER-OF-SHARES-REDEEMED> 270,100
<SHARES-REINVESTED> 6,588
<NET-CHANGE-IN-ASSETS> 5,939,342
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 20,973
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 166,123
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 175,032
<AVERAGE-NET-ASSETS> 3,152,133
<PER-SHARE-NAV-BEGIN> 9.85
<PER-SHARE-NII> 0.21
<PER-SHARE-GAIN-APPREC> (0.11)
<PER-SHARE-DIVIDEND> 0.21
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.74
<EXPENSE-RATIO> 0.76
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 61
<NAME> LONG-TERM TREASURY FUND- INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 112,023,791
<INVESTMENTS-AT-VALUE> 111,143,516
<RECEIVABLES> 1,231,745
<ASSETS-OTHER> 498
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 112,375,759
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 668,195
<TOTAL-LIABILITIES> 668,195
<SENIOR-EQUITY> 111,388
<PAID-IN-CAPITAL-COMMON> 117,495,658
<SHARES-COMMON-STOCK> 11,138,779
<SHARES-COMMON-PRIOR> 13,596,076
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (5,019,207)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (880,275)
<NET-ASSETS> 111,707,564
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,771,050
<OTHER-INCOME> 0
<EXPENSES-NET> 312,400
<NET-INVESTMENT-INCOME> 345,650
<REALIZED-GAINS-CURRENT> (4,195,243)
<APPREC-INCREASE-CURRENT> (2,730,551)
<NET-CHANGE-FROM-OPS> (3,467,144)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3,352,872
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,735,486
<NUMBER-OF-SHARES-REDEEMED> 6,499,827
<SHARES-REINVESTED> 307,044
<NET-CHANGE-IN-ASSETS> (28,431,765)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (823,964)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 300,921
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 312,400
<AVERAGE-NET-ASSETS> 117,110,067
<PER-SHARE-NAV-BEGIN> 10.12
<PER-SHARE-NII> 0.28
<PER-SHARE-GAIN-APPREC> (0.54)
<PER-SHARE-DIVIDEND> 0.28
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.58
<EXPENSE-RATIO> 0.51
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 63
<NAME> LONG-TERM TREASURY FUND- ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 112,023,791
<INVESTMENTS-AT-VALUE> 111,143,516
<RECEIVABLES> 1,231,745
<ASSETS-OTHER> 498
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 112,375,759
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 668,195
<TOTAL-LIABILITIES> 668,195
<SENIOR-EQUITY> 5,277
<PAID-IN-CAPITAL-COMMON> 117,601,769
<SHARES-COMMON-STOCK> 527,661
<SHARES-COMMON-PRIOR> 255,748
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (5,019,207)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (880,275)
<NET-ASSETS> 111,707,564
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,771,050
<OTHER-INCOME> 0
<EXPENSES-NET> 312,400
<NET-INVESTMENT-INCOME> 345,650
<REALIZED-GAINS-CURRENT> (4,195,243)
<APPREC-INCREASE-CURRENT> (2,730,551)
<NET-CHANGE-FROM-OPS> (3,467,144)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 105,778
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 355,411
<NUMBER-OF-SHARES-REDEEMED> 91,758
<SHARES-REINVESTED> 8,260
<NET-CHANGE-IN-ASSETS> (28,431,765)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (823,964)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 300,921
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 312,400
<AVERAGE-NET-ASSETS> 3,839,943
<PER-SHARE-NAV-BEGIN> 10.12
<PER-SHARE-NII> 0.27
<PER-SHARE-GAIN-APPREC> (0.54)
<PER-SHARE-DIVIDEND> 0.27
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.58
<EXPENSE-RATIO> 0.76
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 71
<NAME> INFLATION-ADJUSTED TREASURY FUND-INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 16,184,819
<INVESTMENTS-AT-VALUE> 15,920,899
<RECEIVABLES> 156,606
<ASSETS-OTHER> 138,637
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 16,216,142
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 24,221
<TOTAL-LIABILITIES> 24,221
<SENIOR-EQUITY> 17,336
<PAID-IN-CAPITAL-COMMON> 16,601,366
<SHARES-COMMON-STOCK> 1,733,609
<SHARES-COMMON-PRIOR> 947,516
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (162,861)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (263,920)
<NET-ASSETS> 16,191,921
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 379,525
<OTHER-INCOME> 0
<EXPENSES-NET> 28,698
<NET-INVESTMENT-INCOME> 350,827
<REALIZED-GAINS-CURRENT> (92,264)
<APPREC-INCREASE-CURRENT> (100,288)
<NET-CHANGE-FROM-OPS> 158,275
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 350,184
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,159,704
<NUMBER-OF-SHARES-REDEEMED> 405,618
<SHARES-REINVESTED> 32,007
<NET-CHANGE-IN-ASSETS> 7,201,260
<ACCUMULATED-NII-PRIOR> (70,597)
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28,480
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 28,698
<AVERAGE-NET-ASSETS> 11,276,326
<PER-SHARE-NAV-BEGIN> 9.48
<PER-SHARE-NII> 0.29
<PER-SHARE-GAIN-APPREC> (0.15)
<PER-SHARE-DIVIDEND> 0.29
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.33
<EXPENSE-RATIO> 0.51
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 16,184,819
<INVESTMENTS-AT-VALUE> 15,920,899
<RECEIVABLES> 156,606
<ASSETS-OTHER> 138,637
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 16,216,142
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 24,221
<TOTAL-LIABILITIES> 24,221
<SENIOR-EQUITY> 22
<PAID-IN-CAPITAL-COMMON> 16,618,680
<SHARES-COMMON-STOCK> 2,228
<SHARES-COMMON-PRIOR> 1,080
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (162,861)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (263,920)
<NET-ASSETS> 16,191,921
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 379,525
<OTHER-INCOME> 0
<EXPENSES-NET> 28,698
<NET-INVESTMENT-INCOME> 350,827
<REALIZED-GAINS-CURRENT> (92,264)
<APPREC-INCREASE-CURRENT> (100,288)
<NET-CHANGE-FROM-OPS> 158,275
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 643
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,187
<NUMBER-OF-SHARES-REDEEMED> 1,102
<SHARES-REINVESTED> 63
<NET-CHANGE-IN-ASSETS> 7,201,260
<ACCUMULATED-NII-PRIOR> (70,597)
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 28,480
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 28,698
<AVERAGE-NET-ASSETS> 21,010
<PER-SHARE-NAV-BEGIN> 9.48
<PER-SHARE-NII> 0.28
<PER-SHARE-GAIN-APPREC> (0.15)
<PER-SHARE-DIVIDEND> 0.28
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.33
<EXPENSE-RATIO> 0.76
</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 81
<NAME> CAPITAL PRESERVATION FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 2,318,942,214
<INVESTMENTS-AT-VALUE> 2,318,942,214
<RECEIVABLES> 1,011,309,687
<ASSETS-OTHER> 15,882,418
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 3,346,134,319
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,315,569
<TOTAL-LIABILITIES> 1,315,569
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3,344,848,817
<SHARES-COMMON-STOCK> 3,344,848,817
<SHARES-COMMON-PRIOR> 3,324,804,940
<ACCUMULATED-NII-CURRENT> (13,664)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (16,403)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 3,344,818,750
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 77,619,444
<OTHER-INCOME> 0
<EXPENSES-NET> 7,825,221
<NET-INVESTMENT-INCOME> 69,794,223
<REALIZED-GAINS-CURRENT> 519,663
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 70,313,886
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 69,807,887
<DISTRIBUTIONS-OF-GAINS> 536,066
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,202,857,251
<NUMBER-OF-SHARES-REDEEMED> 1,250,072,377
<SHARES-REINVESTED> 67,259,003
<NET-CHANGE-IN-ASSETS> 20,013,810
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 7,781,096
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7,825,221
<AVERAGE-NET-ASSETS> 3,287,603,632
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.02
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.47
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 91
<NAME> SHORT-TERM GOVERNMENT FUND - INVESTOR CLASS
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 809,849
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<SHARES-COMMON-STOCK> 86,434
<SHARES-COMMON-PRIOR> 87,891
<ACCUMULATED-NII-CURRENT> 0
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<ACCUMULATED-NET-GAINS> (91,523)
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<ACCUM-APPREC-OR-DEPREC> (4,210)
<NET-ASSETS> 802,972
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<INTEREST-INCOME> 23,737
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<NET-INVESTMENT-INCOME> 21,355
<REALIZED-GAINS-CURRENT> (11,985)
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<DISTRIBUTIONS-OF-INCOME> 21,351
<DISTRIBUTIONS-OF-GAINS> 0
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<NUMBER-OF-SHARES-SOLD> 6,276
<NUMBER-OF-SHARES-REDEEMED> 9,865
<SHARES-REINVESTED> 2,133
<NET-CHANGE-IN-ASSETS> (29,466)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (79,538)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,369
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,382
<AVERAGE-NET-ASSETS> 808,518,471
<PER-SHARE-NAV-BEGIN> 9.47
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> (0.18)
<PER-SHARE-DIVIDEND> 0.24
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.29
<EXPENSE-RATIO> 0.59
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE SEMI-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> 93
<NAME> SHORT-TERM GOVERNMENT FUND - ADVISOR CLASS
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 809,849
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<ASSETS-OTHER> 1,345
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<TOTAL-LIABILITIES> 9,787
<SENIOR-EQUITY> 322
<PAID-IN-CAPITAL-COMMON> 898,383
<SHARES-COMMON-STOCK> 32,246
<SHARES-COMMON-PRIOR> 9,887
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (91,523)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (4,210)
<NET-ASSETS> 802,972
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 23,737
<OTHER-INCOME> 0
<EXPENSES-NET> 2,382
<NET-INVESTMENT-INCOME> 21,355
<REALIZED-GAINS-CURRENT> (11,985)
<APPREC-INCREASE-CURRENT> (4,049)
<NET-CHANGE-FROM-OPS> 5,321
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 4
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 31
<NUMBER-OF-SHARES-REDEEMED> 9
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (29,466)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (79,538)
<OVERDISTRIB-NII-PRIOR> 0
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<GROSS-ADVISORY-FEES> 2,369
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,382
<AVERAGE-NET-ASSETS> 148,686
<PER-SHARE-NAV-BEGIN> 9.47
<PER-SHARE-NII> 0.23
<PER-SHARE-GAIN-APPREC> (0.18)
<PER-SHARE-DIVIDEND> 0.23
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<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 9.29
<EXPENSE-RATIO> 0.84
</TABLE>
