18 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Lehi | Utah County | 97,591 |
| Layton | Davis County | 84,921 |
| Logan | Cache County | 57,745 |
| Lindon | Utah County | 12,152 |
| La Verkin | Washington County | 4,574 |
| Lake Point | 2,839 | |
| Lewiston | Cache County | 1,979 |
| Lake Shore | Utah County | 1,339 |
| Liberty | Weber County | 1,206 |
| Levan | Juab County | 926 |
| Leeds | Washington County | 859 |
| Loa | Wayne County | 508 |
| Laketown | Rich County | 328 |
| Leamington | Millard County | 281 |
| La Sal | San Juan County | 239 |
| Lyman | Wayne County | 220 |
| Lynndyl | Millard County | 125 |
| Lapoint | Uintah County | 60 |