[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-31-1999
[PERIOD-END]                               SEP-30-1998
[INVESTMENTS-AT-COST]                      400,527,202
[INVESTMENTS-AT-VALUE]                     441,119,827
[RECEIVABLES]                               15,320,819
[ASSETS-OTHER]                               1,246,238
[OTHER-ITEMS-ASSETS]                                 0
[TOTAL-ASSETS]                             457,686,884
[PAYABLE-FOR-SECURITIES]                     6,986,877
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      249,830
[TOTAL-LIABILITIES]                          7,236,707
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                   404,650,143
[SHARES-COMMON-STOCK]                        2,055,455
[SHARES-COMMON-PRIOR]                        1,434,762
[ACCUMULATED-NII-CURRENT]                    (243,165)
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                      5,450,574
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                    40,592,625
[NET-ASSETS]                               450,450,177
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                           12,541,277
[OTHER-INCOME]                                       0
[EXPENSES-NET]                               1,514,286
[NET-INVESTMENT-INCOME]                     11,026,991
[REALIZED-GAINS-CURRENT]                     1,165,420
[APPREC-INCREASE-CURRENT]                    8,008,582
[NET-CHANGE-FROM-OPS]                       20,200,993
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                      615,302
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                        709,451
[NUMBER-OF-SHARES-REDEEMED]                    112,125
[SHARES-REINVESTED]                             23,366
[NET-CHANGE-IN-ASSETS]                      43,298,500
[ACCUMULATED-NII-PRIOR]                        302,433
[ACCUMULATED-GAINS-PRIOR]                    4,285,154
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                          951,640
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                              1,514,286
[AVERAGE-NET-ASSETS]                        23,878,300
[PER-SHARE-NAV-BEGIN]                            14.16
[PER-SHARE-NII]                                  00.35
[PER-SHARE-GAIN-APPREC]                          00.29
[PER-SHARE-DIVIDEND]                             00.36
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                              14.44
[EXPENSE-RATIO]                                  01.16
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0
</TABLE>