WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000856517
<NAME> Money Market Obligations Trust
<SERIES>
<NUMBER> 172
<NAME> U.S. Treasury Cash Reserves - Institutional Service Shares
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> Apr-30-2001
<PERIOD-END> Oct-31-2000
<INVESTMENTS-AT-COST> 2,566,288,781
<INVESTMENTS-AT-VALUE> 2,566,288,781
<RECEIVABLES> 431,291,698
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 201,358
<TOTAL-ASSETS> 2,997,781,837
<PAYABLE-FOR-SECURITIES> 403,393,932
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 12,850,020
<TOTAL-LIABILITIES> 416,243,952
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2,581,537,885
<SHARES-COMMON-STOCK> 959,746,813
<SHARES-COMMON-PRIOR> 984,972,856
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 959,746,813
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 74,983,154
<OTHER-INCOME> 0
<EXPENSES-NET> (3,698,887)
<NET-INVESTMENT-INCOME> 71,284,267
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 0
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (25,446,761)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,709,864,683
<NUMBER-OF-SHARES-REDEEMED> (1,742,187,285)
<SHARES-REINVESTED> 7,096,559
<NET-CHANGE-IN-ASSETS> 95,782,766
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,994,896
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 9,274,332
<AVERAGE-NET-ASSETS> 909,717,688
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> 0.030
<PER-SHARE-GAIN-APPREC> 0.000
<PER-SHARE-DIVIDEND> (0.030)
<PER-SHARE-DISTRIBUTIONS> 0.000
<RETURNS-OF-CAPITAL> 0.000
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> 0.45
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.000
</TABLE>
