[ARTICLE] 6
[CIK] 0000830487
[NAME] MUNICIPAL HIGH INCOME FUND INC.
<TABLE>
<S>                             <C>
[PERIOD-TYPE]                   6-MOS
[FISCAL-YEAR-END]                          OCT-31-1997
[PERIOD-END]                               APR-30-1997
[INVESTMENTS-AT-COST]                      175,938,289
[INVESTMENTS-AT-VALUE]                     184,225,210
[RECEIVABLES]                                4,689,673
[ASSETS-OTHER]                                 117,952
[OTHER-ITEMS-ASSETS]                                 0
[TOTAL-ASSETS]                             188,952,835
[PAYABLE-FOR-SECURITIES]                     1,472,260
[SENIOR-LONG-TERM-DEBT]                              0
[OTHER-ITEMS-LIABILITIES]                      483,187
[TOTAL-LIABILITIES]                          1,955,447
[SENIOR-EQUITY]                                      0
[PAID-IN-CAPITAL-COMMON]                   182,870,257
[SHARES-COMMON-STOCK]                       19,659,882
[SHARES-COMMON-PRIOR]                                0
[ACCUMULATED-NII-CURRENT]                      327,184
[OVERDISTRIBUTION-NII]                               0
[ACCUMULATED-NET-GAINS]                    (4,486,974)
[OVERDISTRIBUTION-GAINS]                             0
[ACCUM-APPREC-OR-DEPREC]                     8,286,921
[NET-ASSETS]                               186,997,388
[DIVIDEND-INCOME]                                    0
[INTEREST-INCOME]                            6,818,625
[OTHER-INCOME]                                       0
[EXPENSES-NET]                                 712,382
[NET-INVESTMENT-INCOME]                      6,106,243
[REALIZED-GAINS-CURRENT]                    15,488,778
[APPREC-INCREASE-CURRENT]                    1,046,341
[NET-CHANGE-FROM-OPS]                        5,808,178
[EQUALIZATION]                                       0
[DISTRIBUTIONS-OF-INCOME]                    6,114,217
[DISTRIBUTIONS-OF-GAINS]                             0
[DISTRIBUTIONS-OTHER]                                0
[NUMBER-OF-SHARES-SOLD]                              0
[NUMBER-OF-SHARES-REDEEMED]                          0
[SHARES-REINVESTED]                                  0
[NET-CHANGE-IN-ASSETS]                       (306,039)
[ACCUMULATED-NII-PRIOR]                        335,158
[ACCUMULATED-GAINS-PRIOR]                            0
[OVERDISTRIB-NII-PRIOR]                              0
[OVERDIST-NET-GAINS-PRIOR]                           0
[GROSS-ADVISORY-FEES]                          559,033
[INTEREST-EXPENSE]                                   0
[GROSS-EXPENSE]                                712,382
[AVERAGE-NET-ASSETS]                       187,886,880
[PER-SHARE-NAV-BEGIN]                             9.53
[PER-SHARE-NII]                                   0.31
[PER-SHARE-GAIN-APPREC]                         (0.02)
[PER-SHARE-DIVIDEND]                              0.31
[PER-SHARE-DISTRIBUTIONS]                            0
[RETURNS-OF-CAPITAL]                                 0
[PER-SHARE-NAV-END]                               9.51
[EXPENSE-RATIO]                                   0.76
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0
</TABLE>