WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Putnam Investment Grade Municipal Trust
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> CLASS A
<S> <C>
<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
<EQUALIZATION>
<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
</TABLE>