WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000862502
<NAME> Salomon Brothers Small Cap Growth Fund
<SERIES>
   <NUMBER>011
   <NAME>Salomon Brothers Investment Series Funds Inc.

<S>                             <C>
<PERIOD-TYPE>                  6-MOS
<FISCAL-YEAR-END>                               Dec-31-2000
<PERIOD-END>                                    Jun-30-2000
<INVESTMENTS-AT-COST>                           285,196,346
<INVESTMENTS-AT-VALUE>                          356,902,787
<RECEIVABLES>                                    15,603,159
<ASSETS-OTHER>                                          692
<OTHER-ITEMS-ASSETS>                                      0
<TOTAL-ASSETS>                                  372,506,638
<PAYABLE-FOR-SECURITIES>                          8,023,658
<SENIOR-LONG-TERM-DEBT>                                   0
<OTHER-ITEMS-LIABILITIES>                         3,331,807
<TOTAL-LIABILITIES>                              11,355,465
<SENIOR-EQUITY>                                           0
<PAID-IN-CAPITAL-COMMON>                        198,127,788
<SHARES-COMMON-STOCK>                            10,695,071
<SHARES-COMMON-PRIOR>                             9,708,079
<ACCUMULATED-NII-CURRENT>                        (1,237,562)
<OVERDISTRIBUTION-NII>                                    0
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<OVERDISTRIBUTION-GAINS>                                  0
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<DIVIDEND-INCOME>                                   584,873
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<OTHER-INCOME>                                            0
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<NET-INVESTMENT-INCOME>                          (1,237,562)
<REALIZED-GAINS-CURRENT>                         93,490,521
<APPREC-INCREASE-CURRENT>                       (29,935,825)
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<EQUALIZATION>                                            0
<DISTRIBUTIONS-OF-INCOME>                                 0
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<DISTRIBUTIONS-OTHER>                                     0
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<SHARES-REINVESTED>                               1,184,041
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<ACCUMULATED-NII-PRIOR>                                   0
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<INTEREST-EXPENSE>                                        0
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<PER-SHARE-NII>                                      (0.030)
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<RETURNS-OF-CAPITAL>                                  0.000
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<EXPENSE-RATIO>                                        1.35



</TABLE>