14 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Riverton | Salt Lake County | 44,564 |
| Roy | Weber County | 38,107 |
| Riverdale | Davis County | 9,012 |
| Richfield | Sevier County | 8,342 |
| Roosevelt | Duchesne County | 7,505 |
| Richmond | Cache County | 3,094 |
| River Heights | Cache County | 2,193 |
| Riverside | Box Elder County | 1,414 |
| Rocky Ridge | Juab County | 1,134 |
| Redmond | Sevier County | 826 |
| Rush Valley | Tooele County | 522 |
| Randolph | Rich County | 491 |
| Rockville | Washington County | 221 |
| Randlett | Uintah County | 23 |