18 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Lehi | Utah County | 101,737 |
| Layton | Davis County | 85,495 |
| Logan | Cache County | 58,720 |
| Lindon | Utah County | 12,286 |
| La Verkin | Washington County | 4,620 |
| Lake Point | 2,940 | |
| Lewiston | Cache County | 1,988 |
| Liberty | Weber County | 1,351 |
| Lake Shore | Utah County | 1,340 |
| Levan | Juab County | 938 |
| Leeds | Washington County | 858 |
| Loa | Wayne County | 505 |
| Laketown | Rich County | 332 |
| Leamington | Millard County | 285 |
| Lyman | Wayne County | 223 |
| La Sal | San Juan County | 218 |
| Lynndyl | Millard County | 127 |
| Lapoint | Uintah County | 60 |