| Mercer County, WV (County) |
| Mercer County, IL (County) |
| Mercer County, MO (County) |
| Mercer Island, WA (City) |
| Mercer Town, WI (Town) |
| Mercer Township, PA (Township) |
| Mercer Township, IL (Township) |
| Mercer Township, IA (Township) |
| Mercersburg, PA (Borough) |
| Merchantville, NJ (Borough) |
| Mercier, SD (Township) |
| Meredith, NH (Town) |
| Meredith, KS (Township) |
| Meredith, NY (Town) |
| Meredosia, IL (Village) |
