<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000701939
<NAME> SEI DAILY INCOME TRUST
<SERIES>
<NUMBER> 153
<NAME> TREASURY SWEEP CLASS
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JAN-31-2000
<PERIOD-START> FEB-01-2000
<PERIOD-END> JUL-31-2000
<INVESTMENTS-AT-COST> 745118
<INVESTMENTS-AT-VALUE> 745118
<RECEIVABLES> 1767
<ASSETS-OTHER> 61
<OTHER-ITEMS-ASSETS> 60
<TOTAL-ASSETS> 747006
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 4411
<TOTAL-LIABILITIES> 4411
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 510399
<SHARES-COMMON-STOCK> 92784
<SHARES-COMMON-PRIOR> 82775
<ACCUMULATED-NII-CURRENT> 7
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> (11)
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 742595
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 20345
<OTHER-INCOME> 0
<EXPENSES-NET> (1661)
<NET-INVESTMENT-INCOME> 18684
<REALIZED-GAINS-CURRENT> (2)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 18682
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2244)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 201927
<NUMBER-OF-SHARES-REDEEMED> (191918)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 10006
<ACCUMULATED-NII-PRIOR> 29
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (9)
<GROSS-ADVISORY-FEES> 78
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2257
<AVERAGE-NET-ASSETS> 667659
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.95
</TABLE>
