WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

 

<ARTICLE> 6
<LEGEND>
Putnam Investment Grade Municipal Trust


   <NUMBER> 1
   <NAME> CLASS A

                             
<PERIOD-TYPE>                   SEMI
<FISCAL-YEAR-END>                            NOV-30-99
<PERIOD-END>                                 MAY-31-00
<INVESTMENTS-AT-COST>                      362,531,833
<INVESTMENTS-AT-VALUE>                     356,829,091
<RECEIVABLES>                                7,093,676
<ASSETS-OTHER>                                 470,985
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             364,393,752
<PAYABLE-FOR-SECURITIES>                     4,851,117
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    2,398,510
<TOTAL-LIABILITIES>                          7,249,627
<SENIOR-EQUITY>                            140,000,000
<PAID-IN-CAPITAL-COMMON>                   234,734,633
<SHARES-COMMON-STOCK>                       21,111,888
<SHARES-COMMON-PRIOR>                       21,015,824
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                     (1,148,499)
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                  (11,233,084)
<ACCUM-APPREC-OR-DEPREC>                   (5,208,925)
<NET-ASSETS>                               357,144,125
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           12,504,990
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,569,378
<NET-INVESTMENT-INCOME>                     10,935,612
<REALIZED-GAINS-CURRENT>                   (1,465,008)
<APPREC-INCREASE-CURRENT>                  (5,505,401)
<NET-CHANGE-FROM-OPS>                        3,965,203

<DISTRIBUTIONS-OF-INCOME>                 (13,103,786)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                             96,064
<NET-CHANGE-IN-ASSETS>                     (8,092,744)
<ACCUMULATED-NII-PRIOR>                      1,019,675
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                 (9,768,076)
<GROSS-ADVISORY-FEES>                        1,257,358
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,650,348
<AVERAGE-NET-ASSETS>                       359,964,471
<PER-SHARE-NAV-BEGIN>                            10.71
<PER-SHARE-NII>                                   0.52
<PER-SHARE-GAIN-APPREC>                         (0.33)
<PER-SHARE-DIVIDEND>                            (0.62)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.28
<EXPENSE-RATIO>                                   0.75
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0