22 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Auburn | Androscoggin County | 25,641 |
| Augusta | Kennebec County | 19,206 |
| Arundel | York County | 4,543 |
| Alfred | York County | 3,191 |
| Acton | York County | 2,725 |
| Anson | Somerset County | 2,327 |
| Albion | Kennebec County | 2,111 |
| Appleton | Knox County | 1,451 |
| Addison | Washington County | 1,213 |
| Ashland | Aroostook County | 1,208 |
| Athens | Somerset County | 958 |
| Andover | Oxford County | 907 |
| Alton | Penobscot County | 835 |
| Alna | Lincoln County | 740 |
| Abbot | Piscataquis County | 645 |
| Alexander | Washington County | 522 |
| Arrowsic | Sagadahoc County | 502 |
| Avon | Franklin County | 449 |
| Amherst | Hancock County | 252 |
| Amity | Aroostook County | 251 |
| Allagash | Aroostook County | 236 |
| Aurora | Hancock County | 93 |