| City | County | 2026 Pop. ↓ |
|---|---|---|
| Bountiful | Davis County | 44,791 |
| Brigham City | Box Elder County | 20,783 |
| Bluffdale | Utah County | 20,015 |
| Beaver | Beaver County | 3,727 |
| Blanding | San Juan County | 3,153 |
| Benson | Cache County | 1,951 |
| Ballard | Duchesne County | 1,339 |
| Bear River City | Box Elder County | 923 |
| Benjamin | Utah County | 585 |
| Big Water | Kane County | 555 |
| Brighton | Salt Lake County | 428 |
| Bryce Canyon City | Garfield County | 350 |
| Bicknell | Wayne County | 322 |
| Bluebell | Duchesne County | 267 |
| Bluff | San Juan County | 253 |
| Boulder | Garfield County | 252 |
| Brian Head | Iron County | 165 |