| Mequon, WI (City) |
| Mer Rouge, LA (Village) |
| Merced, CA (City) |
| Merced County, CA (County) |
| Mercedes, TX (City) |
| Mercer, ND (City) |
| Mercer, ND (Township) |
| Mercer, MO (City) |
| Mercer, ME (Town) |
| Mercer, PA (Borough) |
| Mercer County, PA (County) |
| Mercer County, NJ (County) |
| Mercer County, OH (County) |
| Mercer County, ND (County) |
| Mercer County, KY (County) |
