| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Uncasville | city | Connecticut | United States | 41.43444 | -72.11028 | 75 | 28811 |
| Union | city | Connecticut | United States | 41.99083 | -72.15778 | 918 | 2343 |
| Union City | city | Connecticut | United States | 41.49667 | -73.04889 | 196 | 53817 |
| Unionville | city | Connecticut | United States | 41.75778 | -72.88667 | 206 | 32387 |
| Upper Merryall | city | Connecticut | United States | 41.66222 | -73.4225 | 600 | 9665 |
| Upper Stepney | city | Connecticut | United States | 41.3225 | -73.26556 | 400 | 23363 |
|
|