| Matinicus Isle, ME (Plantation) |
| Matlock, IA (City) |
| Matoaka, WV (Town) |
| Mattapoisett, MA (Town) |
| Mattawa, WA (Town) |
| Mattawamkeag, ME (Town) |
| Mattawan, MI (Village) |
| Matteson, IL (Village) |
| Matteson Town, WI (Town) |
| Matteson Township, MI (Township) |
| Matthews, NC (Town) |
| Matthews, IN (Town) |
| Matthews, MO (City) |
| Mattoon, IL (City) |
| Mattoon Township, IL (Township) |
