28 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Lewiston | Androscoggin County | 38,835 |
| Lisbon | Androscoggin County | 9,847 |
| Lebanon | York County | 6,770 |
| Lincoln | Penobscot County | 4,958 |
| Lyman | York County | 4,661 |
| Limington | York County | 4,164 |
| Litchfield | Kennebec County | 3,781 |
| Limerick | York County | 3,567 |
| Livermore Falls | Androscoggin County | 3,222 |
| Levant | Penobscot County | 3,220 |
| Lincolnville | Waldo County | 2,440 |
| Leeds | Androscoggin County | 2,410 |
| Livermore | Androscoggin County | 2,211 |
| Lamoine | Hancock County | 1,815 |
| Limestone | Aroostook County | 1,483 |
| Lubec | Washington County | 1,233 |
| Lovell | Oxford County | 1,155 |
| Littleton | Aroostook County | 1,003 |
| Linneus | Aroostook County | 954 |
| Liberty | Waldo County | 944 |
| Lee | Penobscot County | 919 |
| Lagrange | Penobscot County | 641 |
| Ludlow | Aroostook County | 438 |
| Lowell | Penobscot County | 384 |
| Long Island | Cumberland County | 232 |
| Lake View | Piscataquis County | 155 |
| Lakeville | Penobscot County | 103 |
| Lincoln | Oxford County | 40 |