[ARTICLE] 6
[CIK] 0000943309
[NAME] SMITH BARNEY INSTITUTIONAL CASH MANAGEMENT FUND INC.
[SERIES]
   [NUMBER] 1
   [NAME] CASH PORTFOLIO
<TABLE>
<S>                             <C>
[PERIOD-TYPE]                   YEAR
[FISCAL-YEAR-END]                          MAY-31-1999
[PERIOD-END]                               MAY-31-1999
[INVESTMENTS-AT-COST]                    1,079,102,248
[INVESTMENTS-AT-VALUE]                   1,079,102,248
[RECEIVABLES]                                1,760,774
[ASSETS-OTHER]                                 188,442
[OTHER-ITEMS-ASSETS]                                 0
[TOTAL-ASSETS]                           1,081,051,464
[PAYABLE-FOR-SECURITIES]                    19,098,008
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                    5,448,374
[TOTAL-LIABILITIES]                         24,546,382
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                 1,056,505,082
[SHARES-COMMON-STOCK]                    1,056,498,989
[SHARES-COMMON-PRIOR]                      848,376,694
[ACCUMULATED-NII-CURRENT]                            0
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                              0
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                             0
[NET-ASSETS]                             1,056,505,082
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                           51,879,884
[OTHER-INCOME]                                       0
[EXPENSES-NET]                              2,248,5233
[NET-INVESTMENT-INCOME]                     49,631,651
[REALIZED-GAINS-CURRENT]                        29,546
[APPREC-INCREASE-CURRENT]                            0
[NET-CHANGE-FROM-OPS]                       49,661,197
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                   49,631,651
[DISTRIBUTIONS-OF-GAINS]                        29,546
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                  7,683,594,257
[NUMBER-OF-SHARES-REDEEMED]              7,522,505,306
[SHARES-REINVESTED]                         47,033,344
[NET-CHANGE-IN-ASSETS]                     305,722,501
[ACCUMULATED-NII-PRIOR]                              0
[ACCUMULATED-GAINS-PRIOR]                            0
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                        2,641,152
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                              3,030,739
[AVERAGE-NET-ASSETS]                       978,204,339
[PER-SHARE-NAV-BEGIN]                             1.00
[PER-SHARE-NII]                                   0.05
[PER-SHARE-GAIN-APPREC]                              0
[PER-SHARE-DIVIDEND]                              0.05
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               1.00
[EXPENSE-RATIO]                                   0.23
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0
</TABLE>