28 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Lewiston | Androscoggin County | 38,898 |
| Lisbon | Androscoggin County | 9,880 |
| Lebanon | York County | 6,808 |
| Lincoln | Penobscot County | 4,971 |
| Lyman | York County | 4,667 |
| Limington | York County | 4,202 |
| Litchfield | Kennebec County | 3,812 |
| Limerick | York County | 3,586 |
| Livermore Falls | Androscoggin County | 3,271 |
| Levant | Penobscot County | 3,237 |
| Lincolnville | Waldo County | 2,462 |
| Leeds | Androscoggin County | 2,458 |
| Livermore | Androscoggin County | 2,232 |
| Lamoine | Hancock County | 1,831 |
| Limestone | Aroostook County | 1,470 |
| Lubec | Washington County | 1,229 |
| Lovell | Oxford County | 1,153 |
| Littleton | Aroostook County | 999 |
| Linneus | Aroostook County | 953 |
| Liberty | Waldo County | 941 |
| Lee | Penobscot County | 919 |
| Lagrange | Penobscot County | 641 |
| Ludlow | Aroostook County | 434 |
| Lowell | Penobscot County | 385 |
| Long Island | Cumberland County | 231 |
| Lake View | Piscataquis County | 155 |
| Lakeville | Penobscot County | 102 |
| Lincoln | Oxford County | 39 |