This list of current cities, towns, unincorporated communities, and other recognized places in the U.S. state of Arkansas whose name begins with the letter U. It also includes information on the number and names of counties in which the place lies, and its lower and upper zip code bounds, if applicable.
| Name of place | Number of counties | Principal county | Lower zip code | Upper zip code |
|---|---|---|---|---|
| Ulm | 1 | Prairie County | 72170 | |
| Umpire | 1 | Howard County | 71971 | |
| Unco | 1 | Calhoun County | ||
| Union | 1 | Fulton County | 72576 | |
| Union | 1 | Logan County | ||
| Union | 1 | Sevier County | 71832 | |
| Union | 1 | Union County | 71765 | |
| Union | 1 | Woodruff County | ||
| Unionhill | 1 | Independence County | 72020 | |
| Union Hill | 1 | Independence County | ||
| Union Hill | 1 | Scott County | 72866 | |
| Union Ridge | 1 | Sebastian County | 72927 | |
| Uniontown | 1 | Crawford County | 72955 | |
| Union Valley | 1 | Lonoke County | ||
| Unity | 1 | Greene County | ||
| University | 1 | Washington County | 72701 | |
| Uno | 1 | Poinsett County | 72479 | |
| Urbana | 1 | Union County | 71768 | |
| Urbanette | 1 | Carroll County | 72616 | |
| Ursula | 1 | Sebastian County | 72933 |
