<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000830487
<NAME> MUNICIPAL HIGH INCOME FUND INC.
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                      179,490,677
<INVESTMENTS-AT-VALUE>                     192,022,200
<RECEIVABLES>                                4,505,499
<ASSETS-OTHER>                                  79,352
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             196,607,051
<PAYABLE-FOR-SECURITIES>                     2,239,160
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      234,598
<TOTAL-LIABILITIES>                          2,473,758
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   185,007,253
<SHARES-COMMON-STOCK>                       19,885,306
<SHARES-COMMON-PRIOR>                       19,659,882
<ACCUMULATED-NII-CURRENT>                      136,698
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (3,542,181)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    12,531,523
<NET-ASSETS>                               194,133,293
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           13,493,658
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,411,050
<NET-INVESTMENT-INCOME>                     12,082,608
<REALIZED-GAINS-CURRENT>                     (388,613)
<APPREC-INCREASE-CURRENT>                    5,290,943
<NET-CHANGE-FROM-OPS>                       16,973,938
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   12,281,068
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                          2,136,996
<NET-CHANGE-IN-ASSETS>                       6,829,866
<ACCUMULATED-NII-PRIOR>                        335,158
<ACCUMULATED-GAINS-PRIOR>                  (3,142,568)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,136,844
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,411,050
<AVERAGE-NET-ASSETS>                       189,492,720
<PER-SHARE-NAV-BEGIN>                             9.53
<PER-SHARE-NII>                                   0.61
<PER-SHARE-GAIN-APPREC>                           0.24
<PER-SHARE-DIVIDEND>                              0.62
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.76
<EXPENSE-RATIO>                                   0.74
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>