28 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Lewiston | Androscoggin County | 38,188 |
| Lisbon | Androscoggin County | 9,711 |
| Lebanon | York County | 6,806 |
| Lincoln | Penobscot County | 4,876 |
| Lyman | York County | 4,666 |
| Limington | York County | 4,175 |
| Litchfield | Kennebec County | 3,785 |
| Limerick | York County | 3,697 |
| Levant | Penobscot County | 3,423 |
| Livermore Falls | Androscoggin County | 3,183 |
| Lincolnville | Waldo County | 2,461 |
| Leeds | Androscoggin County | 2,340 |
| Livermore | Androscoggin County | 2,155 |
| Lamoine | Hancock County | 1,800 |
| Limestone | Aroostook County | 1,513 |
| Lubec | Washington County | 1,243 |
| Lovell | Oxford County | 1,195 |
| Littleton | Aroostook County | 1,020 |
| Liberty | Waldo County | 968 |
| Linneus | Aroostook County | 964 |
| Lee | Penobscot County | 907 |
| Lagrange | Penobscot County | 645 |
| Ludlow | Aroostook County | 447 |
| Lowell | Penobscot County | 390 |
| Long Island | Cumberland County | 227 |
| Lake View | Piscataquis County | 156 |
| Lakeville | Penobscot County | 104 |
| Lincoln | Oxford County | 45 |