United States Senate special election in Massachusetts, 2010 By municipality By municipality

| Municipality | Coakley_votes | Coakley_ | Brown_votes | Brown_ | Kennedy_votes | Kennedy_ | Total_vote | Turnout_ |
|---|---|---|---|---|---|---|---|---|
| Mansfield | 3045 | 33.8% | 5909 | 65.5% | 65 | 0.7% | 9019 | 63% |
| Marblehead | 4657 | 46.5% | 5285 | 52.8% | 64 | 0.6% | 10006 | 69% |
| Marion | 1002 | 42.6% | 1332 | 56.7% | 17 | 0.7% | 2351 | 64% |
| Marlborough | 5037 | 42.0% | 6817 | 56.9% | 128 | 1.1% | 11982 | 59% |
| Marshfield | 3895 | 33.4% | 7677 | 65.8% | 91 | 0.8% | 11663 | 66% |
| Mashpee | 2313 | 37.3% | 3835 | 61.8% | 60 | 1.0% | 6208 | 61% |
| Mattapoisett | 1317 | 41.4% | 1834 | 57.7% | 27 | 0.8% | 3178 | 65% |
| Maynard | 2231 | 51.1% | 2131 | 48.8% | 2 | 0.0% | 4364 | 60% |
| Medfield | 2276 | 37.0% | 3842 | 62.4% | 40 | 0.6% | 6158 | 74% |
| Medford | 11415 | 57.1% | 8381 | 41.9% | 206 | 1.0% | 20002 | 57% |
| Medway | 2044 | 35.7% | 3641 | 63.6% | 38 | 0.7% | 5723 | 64% |
| Melrose | 5861 | 48.7% | 6085 | 50.6% | 91 | 0.8% | 12037 | 64% |