| Matagorda County, TX (County) |
| Matamoras, PA (Borough) |
| Matanuska-Susitna Borough, AK (County) |
| Matawan, NJ (Borough) |
| Matchwood Township, MI (Township) |
| Matewan, WV (Town) |
| Matfield, KS (Township) |
| Matfield Green, KS (City) |
| Matherville, IL (Village) |
| Mathews, SD (Township) |
| Mathews County, VA (County) |
| Mathias Township, MI (Township) |
| Mathis, TX (City) |
| Mathiston, MS (Town) |
| Matinecock, NY (Village) |
