| Mark Township, OH (Township) |
| Marked Tree, AR (City) |
| Markesan, WI (City) |
| Markey Township, MI (Township) |
| Markham, IL (City) |
| Markle, IN (Town) |
| Marklesburg, PA (Borough) |
| Markleville, IN (Town) |
| Markleysburg, PA (Borough) |
| Marks, MS (City) |
| Marksville, LA (City) |
| Marland, OK (Town) |
| Marlar, SD (Township) |
| Marlboro, VT (Town) |
| Marlboro County, SC (County) |
