U
| Community | County | ||
| Ulan | Pittsburg. | ||
| Ultima Thule | McCurtain | ||
| Unger | Choctaw | ||
| † | Union | Cleveland | |
| Union | Kingfisher | ||
| Union | Tulsa | ||
| Union Hill | Pontotoc | ||
| Union Valley | Pontotoc | ||
| † | Uniroyal | Carter | |
| Utica | Bryan | ||
| † Geographic or historic reference undetermined. | |||
Read more about this topic: List Of Unincorporated Communities In Oklahoma