| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ulm | city | Montana | United States | 47.43 | -111.51 | 3392 | |
| Ulmer | city | Montana | United States | 46.35 | -105.93 | 2509 | |
| Union (historical) | city | Montana | United States | 47.19 | -105.31 | 3349 | |
| Unionville | city | Montana | United States | 46.54 | -112.09 | 5869 | |
| University Heights | city | Montana | United States | 46.03 | -114.22 | 4215 | |
| Upper Bridger (historical) | city | Montana | United States | 45.74 | -110.90 | 5305 | |
| Upper Ellis Place | city | Montana | United States | 47.32 | -112.34 | 4399 | |
| Ural (historical) | city | Montana | United States | 48.61 | -115.25 | 2509 | |
| Urback Place | city | Montana | United States | 45.67 | -110.45 | 5029 | |
| Utica | city | Montana | United States | 46.97 | -110.09 | 4507 |