<PAGE> PAGE 1
000 B000000 12/31/1999
000 C000000 0000880268
000 D000000 N
000 E000000 NF
000 F000000 Y
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000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 AMERICAN CENTURY INTERNATIONAL BOND FUNDS
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001 C000000 8165315575
002 A000000 4500 MAIN
002 B000000 KANSAS CITY
002 C000000 MO
002 D010000 64111
002 D020000 7709
003 000000 N
004 000000 N
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008 A00AA01 DELETE
008 A00AA02 J.P. MORGAN INVESTMENT MANAGEMENT, INC.
008 B00AA02 S
008 C00AA02 801-21011
008 D01AA02 NEW YORK
008 D02AA02 NY
008 D03AA02 10036
008 A00AA03 AMERICAN CENTURY INVESTMENT MANAGEMENT, INC.
008 B00AA03 A
008 C00AA03 801-08174
008 D01AA03 KANSAS CITY
008 D02AA03 MO
008 D03AA03 64111
008 D04AA03 7709
010 A00AA01 AMERICAN CENTURY SERVICES CORPORATION
010 B00AA01 84-1406
<PAGE> PAGE 2
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010 C02AA01 MO
010 C03AA01 64111
010 C04AA01 7709
010 A00AA02 FUNDS DISTRIBUTOR, INC.
010 B00AA02 8-20518
010 C01AA02 BOSTON
010 C02AA02 MA
010 C03AA02 02109
011 A00AA01 FUNDS DISTRIBUTOR, INC.
011 B00AA01 8-20518
011 C01AA01 BOSTON
011 C02AA01 MA
011 C03AA01 02109
011 A00AA02 AMERICAN CENTURY INVESTMENT SERVICES, INC.
011 B00AA02 8-35220
011 C01AA02 KANSAS CITY
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014 A00AA01 AMERICAN CENTURY SERVICES CORPORATION
014 B00AA01 8-35220
014 A00AA02 AMERICAN CENTURY BROKERAGE, INC.
014 B00AA02 8-50034
015 A00AA01 STATE STREET BANK AND TRUST COMPANY
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015 C01AA01 BOSTON
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015 C03AA01 02101
015 E01AA01 X
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<PAGE> PAGE 3
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022 A000001 FUJI BANK OF NEW YORK
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022 C000010 8923
022 D000010 10978
023 C000000 2265476
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<PAGE> PAGE 4
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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SIGNATURE MARYANNE ROEPKE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE ANNUAL REPORT OF AMERICAN CENTURY INTERNATIONAL BOND
FUNDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000880268
<NAME> AMERICAN CENTURY INTERNATIONAL BOND FUND
<SERIES>
<NUMBER> 11
<NAME> INTERNATIONAL BOND FUND - INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> DEC-31-1999
<INVESTMENTS-AT-COST> 119,427,711
<INVESTMENTS-AT-VALUE> 111,069,928
<RECEIVABLES> 2,727,699
<ASSETS-OTHER> 341,916
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 114,139,573
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 444,601
<TOTAL-LIABILITIES> 444,601
<SENIOR-EQUITY> 107,122
<PAID-IN-CAPITAL-COMMON> 122,659,692
<SHARES-COMMON-STOCK> 10,712,230
<SHARES-COMMON-PRIOR> 12,652,560
<ACCUMULATED-NII-CURRENT> 3,504,113
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,279,280)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (8,296,675)
<NET-ASSETS> 113,694,972
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,466,889
<OTHER-INCOME> 0
<EXPENSES-NET> 1,138,045
<NET-INVESTMENT-INCOME> 4,328,844
<REALIZED-GAINS-CURRENT> (4,280,346)
<APPREC-INCREASE-CURRENT> (15,745,010)
<NET-CHANGE-FROM-OPS> (15,696,512)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5,282,666
<DISTRIBUTIONS-OF-GAINS> 2,487,639
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,877,362
<NUMBER-OF-SHARES-REDEEMED> 8,824,153
<SHARES-REINVESTED> 6,461
<NET-CHANGE-IN-ASSETS> (43,750,315)
<ACCUMULATED-NII-PRIOR> 4,463,061
<ACCUMULATED-GAINS-PRIOR> 2,490,290
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,112,611
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,138,045
<AVERAGE-NET-ASSETS> 132,873,309
<PER-SHARE-NAV-BEGIN> 12.44
<PER-SHARE-NII> 0.36
<PER-SHARE-GAIN-APPREC> (1.62)
<PER-SHARE-DIVIDEND> 0.43
<PER-SHARE-DISTRIBUTIONS> 0.20
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.55
<EXPENSE-RATIO> 0.85
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE ANNUAL REPORT OF AMERICAN CENTURY INTERNATIONAL BOND
FUNDS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000880268
<NAME> AMERICAN CENTURY INTERNATIONAL BOND FUND
<SERIES>
<NUMBER> 13
<NAME> INTERNATIONAL BOND FUND - ADVISOR CLASS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> DEC-31-1999
<INVESTMENTS-AT-COST> 119,427,711
<INVESTMENTS-AT-VALUE> 111,069,928
<RECEIVABLES> 2,727,699
<ASSETS-OTHER> 341,916
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 114,139,573
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 444,601
<TOTAL-LIABILITIES> 444,601
<SENIOR-EQUITY> 690
<PAID-IN-CAPITAL-COMMON> 122,766,124
<SHARES-COMMON-STOCK> 69,060
<SHARES-COMMON-PRIOR> 2,715
<ACCUMULATED-NII-CURRENT> 3,504,113
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,279,280)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (8,296,675)
<NET-ASSETS> 113,694,972
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,466,889
<OTHER-INCOME> 0
<EXPENSES-NET> 1,138,045
<NET-INVESTMENT-INCOME> 4,328,844
<REALIZED-GAINS-CURRENT> (4,280,346)
<APPREC-INCREASE-CURRENT> (15,745,010)
<NET-CHANGE-FROM-OPS> (15,696,512)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5,126
<DISTRIBUTIONS-OF-GAINS> 1,585
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 80,184
<NUMBER-OF-SHARES-REDEEMED> 13,844
<SHARES-REINVESTED> 5
<NET-CHANGE-IN-ASSETS> (32,516,315)
<ACCUMULATED-NII-PRIOR> 4,463,061
<ACCUMULATED-GAINS-PRIOR> 2,490,290
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,112,611
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,138,045
<AVERAGE-NET-ASSETS> 337,473
<PER-SHARE-NAV-BEGIN> 12.44
<PER-SHARE-NII> 0.45
<PER-SHARE-GAIN-APPREC> (1.74)
<PER-SHARE-DIVIDEND> 0.43
<PER-SHARE-DISTRIBUTIONS> 0.20
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.52
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</TABLE>
Report of Independent Accountants
To the Trustees of the American Century International Bond Funds and the
Shareholders of the American Century International Bond Fund: In planning and
performing our audit of the financial statements and financial highlights of the
American Century International Bond Fund (the "Fund") for the year ended
December 31, 1999, we considered its internal control, including control
activities for safeguarding securities, in order to determine our auditing
procedures for the purpose of expressing our opinion on the financial statements
and to comply with the requirements of Form N-SAR, not to provide assurance on
internal control. The management of the Fund is responsible for establishing and
maintaining internal control. In fulfilling this responsibility, estimates and
judgments by management are required to assess the expected benefits and related
costs of controls. Generally, controls that are relevant to an audit pertain to
the entity's objective of preparing financial statements for external purposes
that are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use or disposition. Because of inherent limitations in
internal control, errors or fraud may occur and not be detected. Also,
projection of any evaluation of internal control to future periods is subject to
the risk that controls may become inadequate because of changes in conditions or
that the effectiveness of their design and operation may deteriorate. Our
consideration of internal control would not necessarily disclose all matters in
internal control that might be material weaknesses under standards established
by the American Institute of Certified Public Accountants. A material weakness
is a condition in which the design or operation of one or more of the internal
control components does not reduce to a relatively low level the risk that
misstatements caused by error or fraud in amounts that would be material in
relation to the financial statements being audited may occur and not be detected
within a timely period by employees in the normal course of performing their
assigned functions. However, we noted no matters involving internal control and
its operation, including controls for safeguarding securities that we consider
to be material weaknesses as defined above as of December 31, 1999. This report
is intended solely for the information and use of the Board of Directors,
management and the Securities and Exchange Commission and is not intended to be
and should not be used by anyone other than these specified parties.
February 3, 2000
