| Union City, MI (Village) |
| Union City Township, IA (Township) |
| Union County, NM (County) |
| Union County, OH (County) |
| Union County, FL (County) |
| Union County, NJ (County) |
| Union County, SD (County) |
| Union County, PA (County) |
| Union County, IA (County) |
| Union County, NC (County) |
| Union County, SC (County) |
| Union County, KY (County) |
| Union County, MS (County) |
| Union County, TN (County) |
| Union County, AR (County) |
