18 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Lehi | Utah County | 99,142 |
| Layton | Davis County | 84,496 |
| Logan | Cache County | 56,860 |
| Lindon | Utah County | 11,900 |
| La Verkin | Washington County | 4,618 |
| Lake Point | 2,836 | |
| Lewiston | Cache County | 1,972 |
| Lake Shore | Utah County | 1,339 |
| Liberty | Weber County | 1,206 |
| Levan | Juab County | 933 |
| Leeds | Washington County | 863 |
| Loa | Wayne County | 512 |
| Laketown | Rich County | 311 |
| Leamington | Millard County | 281 |
| La Sal | San Juan County | 239 |
| Lyman | Wayne County | 222 |
| Lynndyl | Millard County | 131 |
| Lapoint | Uintah County | 60 |