9 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Upland | Grant County | 3,820 |
| Union City | Randolph County | 3,432 |
| Utica | Clark County | 1,345 |
| Underwood | Scott County | 1,342 |
| Universal | Vermillion County | 284 |
| Uniondale | Wells County | 277 |
| Union Mills | LaPorte County | 146 |
| Urbana | Wabash County | 145 |
| Ulen | Boone County | 115 |