[ARTICLE] 6
[CIK] 0000775370
[NAME] SMITH BARNEY MUNI FUNDS
[SERIES]
   [NUMBER] 1
   [NAME] NATIONAL PORTFOLIO, CLASS B
<TABLE>
<S>                             <C>
[PERIOD-TYPE]                   6-MOS
[FISCAL-YEAR-END]                          MAR-31-1998
[PERIOD-END]                               SEP-30-1997
[INVESTMENTS-AT-COST]                      364,820,897
[INVESTMENTS-AT-VALUE]                     397,003,263
[RECEIVABLES]                                8,602,569
[ASSETS-OTHER]                                       0
[OTHER-ITEMS-ASSETS]                                 0
[TOTAL-ASSETS]                             405,605,832
[PAYABLE-FOR-SECURITIES]                    20,297,868
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      294,374
[TOTAL-LIABILITIES]                         20,592,242
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                   348,397,643
[SHARES-COMMON-STOCK]                        1,017,180
[SHARES-COMMON-PRIOR]                          932,399
[ACCUMULATED-NII-CURRENT]                      746,797
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                      3,686,784
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                    32,182,366
[NET-ASSETS]                               385,013,590
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                           12,373,506
[OTHER-INCOME]                                       0
[EXPENSES-NET]                               1,387,086
[NET-INVESTMENT-INCOME]                     10,986,420
[REALIZED-GAINS-CURRENT]                     5,313,736
[APPREC-INCREASE-CURRENT]                   10,067,966
[NET-CHANGE-FROM-OPS]                       26,368,122
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                      357,230
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                         93,406
[NUMBER-OF-SHARES-REDEEMED]                     25,054
[SHARES-REINVESTED]                             16,429
[NET-CHANGE-IN-ASSETS]                      26,368,122
[ACCUMULATED-NII-PRIOR]                        703,137
[ACCUMULATED-GAINS-PRIOR]                  (1,626,952)
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                          864,084
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                              1,387,086
[AVERAGE-NET-ASSETS]                        13,604,017
[PER-SHARE-NAV-BEGIN]                            13.61
[PER-SHARE-NII]                                  00.36
[PER-SHARE-GAIN-APPREC]                          00.55
[PER-SHARE-DIVIDEND]                             00.36
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                              14.16
[EXPENSE-RATIO]                                  01.35
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0
</TABLE>