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

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000775370
<NAME> SMITH BARNEY MUNI FUNDS
<SERIES>
   <NUMBER> 1
   <NAME> NATIONAL PORTFOLIO, CLASS B

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-END>                               MAR-31-1999
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<INVESTMENTS-AT-VALUE>                     458,799,339
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<EQUALIZATION>                                       0
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<DISTRIBUTIONS-OTHER>                                0
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<NUMBER-OF-SHARES-REDEEMED>                    251,968
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<ACCUMULATED-NII-PRIOR>                        302,433
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<OVERDISTRIB-NII-PRIOR>                              0
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<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,161,692
<AVERAGE-NET-ASSETS>                        28,883,137
<PER-SHARE-NAV-BEGIN>                            14.16
<PER-SHARE-NII>                                  00.67
<PER-SHARE-GAIN-APPREC>                          00.02
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<RETURNS-OF-CAPITAL>                                 0
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<EXPENSE-RATIO>                                  01.16
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>