| City | County | 2026 Pop. ↓ |
|---|---|---|
| Riverton | Salt Lake County | 47,742 |
| Roy | Weber County | 38,687 |
| Riverdale | Weber County | 9,170 |
| Richfield | Sevier County | 8,534 |
| Roosevelt | Duchesne County | 7,097 |
| Richmond | Cache County | 3,164 |
| River Heights | Cache County | 2,266 |
| Riverside | Box Elder County | 1,348 |
| Rocky Ridge | Juab County | 1,126 |
| Redmond | Sevier County | 830 |
| Rush Valley | Tooele County | 503 |
| Randolph | Rich County | 441 |
| Rockville | Washington County | 224 |
| Randlett | Uintah County | 86 |