14 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Riverton | Salt Lake County | 47,026 |
| Roy | Weber County | 38,567 |
| Riverdale | Davis County | 9,135 |
| Richfield | Sevier County | 8,373 |
| Roosevelt | Duchesne County | 7,536 |
| Richmond | Cache County | 3,130 |
| River Heights | Cache County | 2,244 |
| Riverside | Box Elder County | 1,414 |
| Rocky Ridge | Juab County | 1,081 |
| Redmond | Sevier County | 818 |
| Randolph | Rich County | 506 |
| Rush Valley | Tooele County | 497 |
| Rockville | Washington County | 222 |
| Randlett | Uintah County | 23 |