| Union Township, IL (Township) |
| Union Township, IL (Township) |
| Union Township, IL (Township) |
| Union Township, IL (Township) |
| Union Vale, NY (Town) |
| Union Valley, TX (City) |
| Uniondale, IN (Town) |
| Uniontown, WA (Town) |
| Uniontown, KS (City) |
| Uniontown, KY (City) |
| Uniontown, PA (City) |
| Uniontown, AL (Town) |
| Unionville, NY (Village) |
| Unionville, NC (Town) |
| Unionville, IA (City) |
