22 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Auburn | Androscoggin County | 25,411 |
| Augusta | Kennebec County | 19,197 |
| Arundel | York County | 4,516 |
| Alfred | York County | 3,187 |
| Acton | York County | 2,721 |
| Anson | Somerset County | 2,324 |
| Albion | Kennebec County | 2,102 |
| Appleton | Knox County | 1,455 |
| Ashland | Aroostook County | 1,187 |
| Addison | Washington County | 1,181 |
| Athens | Somerset County | 965 |
| Andover | Oxford County | 890 |
| Alton | Penobscot County | 831 |
| Alna | Lincoln County | 742 |
| Abbot | Piscataquis County | 638 |
| Alexander | Washington County | 517 |
| Arrowsic | Sagadahoc County | 504 |
| Avon | Franklin County | 453 |
| Amherst | Hancock County | 266 |
| Amity | Aroostook County | 249 |
| Allagash | Aroostook County | 232 |
| Aurora | Hancock County | 96 |