22 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Auburn | Androscoggin County | 25,622 |
| Augusta | Kennebec County | 19,226 |
| Arundel | York County | 4,536 |
| Alfred | York County | 3,211 |
| Acton | York County | 2,719 |
| Anson | Somerset County | 2,328 |
| Albion | Kennebec County | 2,113 |
| Appleton | Knox County | 1,458 |
| Addison | Washington County | 1,183 |
| Ashland | Aroostook County | 1,180 |
| Athens | Somerset County | 969 |
| Andover | Oxford County | 885 |
| Alton | Penobscot County | 829 |
| Alna | Lincoln County | 743 |
| Abbot | Piscataquis County | 634 |
| Alexander | Washington County | 514 |
| Arrowsic | Sagadahoc County | 508 |
| Avon | Franklin County | 454 |
| Amherst | Hancock County | 272 |
| Amity | Aroostook County | 247 |
| Allagash | Aroostook County | 231 |
| Aurora | Hancock County | 98 |