Municipality |
County |
Senate |
M |
Machias | Washington | District 29 |
| Machiasport | Washington | District 29 |
| Macwahoc Plt | Aroostook | District 34 | |
| Madawaska | Aroostook | District 35 | |
| Madison | Somerset | District 26 | |
| Madrid Twp | Franklin | District 18 | |
| Magalloway Plt | Oxford | District 14 | |
| Manchester | Kennebec | District 21 | |
| Manset | Hancock | District 28 | |
| Mapleton | Aroostook | District 35 | |
| Mariaville | Hancock | District 31 | |
| Marion Twp | Washington | District 29 | |
| Mars Hill | Aroostook | District 34 | |
| Marshfield | Washington | District 29 | |
| Masardis | Aroostook | District 34 | |
| Mason Twp | Oxford | District 14 | |
| Matinicus Isle Plt | Knox | District 22 | |
| Mattawamkeag | Penobscot | District 30 | |
| Maxfield | Penobscot | District 30 | |
| Mechanic Falls | Androscoggin | District 17 | |
| Meddybemps | Washington | District 29 | |
| Medford | Piscataquis | District 27 | |
| Medomak | Lincoln | District 20 | |
| Medway | Penobscot | District 27 | |
| Mercer | Somerset | District 18 | |
| Merrill | Aroostook | District 34 | |
| Mexico | Oxford | District 14 | |
| Milbridge | Washington | District 29 | |
| Milford | Penobscot | District 31 | |
| Millinocket | Penobscot | District 27 | |
| Milo | Piscataquis | District 27 | |
| Milton Twp | Oxford | District 14 | |
| Minot | Androscoggin | District 17 | |
| Minturn | Hancock | District 28 | |
| Molunkus Twp | Aroostook | District 34 | |
| Monhegan Plt | Lincoln | District 20 | |
| Monmouth | Kennebec | District 21 | |
| Monroe | Waldo | District 23 | |
| Monson | Piscataquis | District 27 | |
| Monticello | Aroostook | District 34 | |
| Montville | Waldo | District 23 | |
| Moody | York | District 02 | |
| Moose River | Somerset | District 26 | |
| Moro Plt | Aroostook | District 34 | |
| Morrill | Waldo | District 23 | |
| Moscow | Somerset | District 26 | |
| Mount Chase | Penobscot | District 27 | |
| Mount Desert | Hancock | District 28 | |
| Mount Vernon | Kennebec | District 18 |