<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000830487
<NAME> MUNICIPAL HIGH INCOME FUND INC.
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          OCT-31-1998
<PERIOD-END>                               OCT-31-1998
<INVESTMENTS-AT-COST>                      188,226,807
<INVESTMENTS-AT-VALUE>                     199,950,818
<RECEIVABLES>                                4,623,457
<ASSETS-OTHER>                                  97,825
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             204,672,100
<PAYABLE-FOR-SECURITIES>                     6,456,817
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      271,209
<TOTAL-LIABILITIES>                          6,728,026
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   188,107,418
<SHARES-COMMON-STOCK>                       20,258,640
<SHARES-COMMON-PRIOR>                       19,885,306
<ACCUMULATED-NII-CURRENT>                     (16,922)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                    (2,073,019)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    11,724,011
<NET-ASSETS>                               197,944,074
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           13,432,644
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,457,387
<NET-INVESTMENT-INCOME>                     11,975,257
<REALIZED-GAINS-CURRENT>                     1,469,162
<APPREC-INCREASE-CURRENT>                    (807,512)
<NET-CHANGE-FROM-OPS>                       12,636,907
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   12,128,877
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                          287,412
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                            373,333
<NET-CHANGE-IN-ASSETS>                       3,810,781
<ACCUMULATED-NII-PRIOR>                        136,698
<ACCUMULATED-GAINS-PRIOR>                  (3,542,181)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        1,180,203
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,457,387
<AVERAGE-NET-ASSETS>                       197,253,156
<PER-SHARE-NAV-BEGIN>                             9.76
<PER-SHARE-NII>                                   0.60
<PER-SHARE-GAIN-APPREC>                           0.03
<PER-SHARE-DIVIDEND>                              0.61
<PER-SHARE-DISTRIBUTIONS>                         0.01
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.77
<EXPENSE-RATIO>                                   0.74
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>