<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000943309
<NAME> SMITH BARNEY INSTITUTIONAL CASH MANAGEMENT FUND INC.
<SERIES>
<NUMBER> 3
<NAME> MUNICIPAL PORTFOLIO
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> MAY-31-2000
<PERIOD-END> MAY-31-2000
<INVESTMENTS-AT-COST> 80,868,386
<INVESTMENTS-AT-VALUE> 80,868,386
<RECEIVABLES> 1,262,565
<ASSETS-OTHER> 77,870
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 82,208,821
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 383,530
<TOTAL-LIABILITIES> 383,530
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 81,830,644
<SHARES-COMMON-STOCK> 81,829,073
<SHARES-COMMON-PRIOR> 311,544,338
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (5,353)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 81,825,291
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 5,786,956
<OTHER-INCOME> 0
<EXPENSES-NET> 373,463
<NET-INVESTMENT-INCOME> 5,413,493
<REALIZED-GAINS-CURRENT> (3,307)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 5,410,186
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5,412,362
<DISTRIBUTIONS-OF-GAINS> 505
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 850,529,119
<NUMBER-OF-SHARES-REDEEMED> 1,085,904,188
<SHARES-REINVESTED> 5,659,804
<NET-CHANGE-IN-ASSETS> (229,717,946)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (1,541)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 382,093
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 552,335
<AVERAGE-NET-ASSETS> 161,688,245
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> 0.03
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.23
</TABLE>
