17 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Bountiful | Davis County | 43,056 |
| Bluffdale | Utah County | 20,240 |
| Brigham City | Box Elder County | 20,158 |
| Beaver | Beaver County | 3,724 |
| Blanding | San Juan County | 3,056 |
| Benson | Cache County | 1,899 |
| Ballard | Duchesne County | 1,300 |
| Bear River City | Box Elder County | 886 |
| Benjamin | Utah County | 774 |
| Big Water | Kane County | 562 |
| Brighton | Salt Lake County | 455 |
| Bryce Canyon City | Garfield County | 344 |
| Bicknell | Wayne County | 328 |
| Boulder | Garfield County | 252 |
| Bluff | San Juan County | 246 |
| Bluebell | Duchesne County | 229 |
| Brian Head | Iron County | 163 |