12 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Upper Arlington | Franklin County | 35,064 |
| University Heights | Cuyahoga County | 12,746 |
| Urbana | Champaign County | 11,170 |
| Uniontown | Stark County | 7,858 |
| Union | Miami County | 7,003 |
| Upper Sandusky | Wyandot County | 6,617 |
| Uhrichsville | Tuscarawas County | 5,088 |
| Utica | Licking County | 2,144 |
| Union City | Darke County | 1,554 |
| Urbancrest | Franklin County | 973 |
| Uniopolis | Auglaize County | 399 |
| Unionville Center | Union County | 230 |