14 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Riverton | Salt Lake County | 47,373 |
| Roy | Weber County | 38,416 |
| Riverdale | Weber County | 9,087 |
| Richfield | Sevier County | 8,416 |
| Roosevelt | Duchesne County | 7,683 |
| Richmond | Cache County | 3,169 |
| River Heights | Cache County | 2,261 |
| Riverside | Box Elder County | 1,348 |
| Rocky Ridge | Juab County | 1,129 |
| Redmond | Sevier County | 828 |
| Randolph | Rich County | 513 |
| Rush Valley | Tooele County | 511 |
| Rockville | Washington County | 221 |
| Randlett | Uintah County | 86 |