<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000357057
<NAME> Fidelity Massachusetts Municipal Trust
<SERIES>
<NUMBER> 11
<NAME> Fidelity Massachusetts Municipal Money Market Fund
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
6-mos
<FISCAL-YEAR-END>
jan-31-2001
<PERIOD-END>
jul-31-2000
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2,451,040
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2,451,040
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51,753
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28
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0
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2,502,821
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5,318
<SENIOR-LONG-TERM-DEBT>
0
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24,008
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29,326
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0
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2,473,517
<SHARES-COMMON-STOCK>
2,473,416
<SHARES-COMMON-PRIOR>
2,084,194
<ACCUMULATED-NII-CURRENT>
0
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0
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(23)
<OVERDISTRIBUTION-GAINS>
0
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1
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2,473,495
<DIVIDEND-INCOME>
0
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45,937
<OTHER-INCOME>
0
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6,147
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39,790
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(1)
<APPREC-INCREASE-CURRENT>
(3)
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39,786
<EQUALIZATION>
0
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39,790
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
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4,399,445
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4,049,338
<SHARES-REINVESTED>
39,115
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389,219
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0
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(11)
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0
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0
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4,313
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0
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6,150
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2,298,173
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1.000
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.017
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0
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.017
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0
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0
<PER-SHARE-NAV-END>
1.000
<EXPENSE-RATIO>
54
</TABLE>
