<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000943309
<NAME> SMITH BARNEY INSTITUTIONAL CASH MANAGEMENT FUND INC.
<SERIES>
<NUMBER> 1
<NAME> CASH PORTFOLIO
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> MAY-31-2000
<PERIOD-END> MAY-31-2000
<INVESTMENTS-AT-COST> 1,920,822,750
<INVESTMENTS-AT-VALUE> 1,920,822,750
<RECEIVABLES> 8,010,877
<ASSETS-OTHER> 92,979
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,928,926,606
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 11,408,429
<TOTAL-LIABILITIES> 11,408,429
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,917,518,177
<SHARES-COMMON-STOCK> 1,917,511,934
<SHARES-COMMON-PRIOR> 1,056,498,989
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1,917,518,177
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 96,454,990
<OTHER-INCOME> 0
<EXPENSES-NET> 3,831,079
<NET-INVESTMENT-INCOME> 92,623,911
<REALIZED-GAINS-CURRENT> 8,300
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 92,632,211
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 92,623,761
<DISTRIBUTIONS-OF-GAINS> 8,300
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 16,123,343,761
<NUMBER-OF-SHARES-REDEEMED> 15,345,128,581
<SHARES-REINVESTED> 82,797,765
<NET-CHANGE-IN-ASSETS> 861,013,095
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,250,471
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,894,724
<AVERAGE-NET-ASSETS> 1,667,103,787
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.06
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.06
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.23
</TABLE>
