| City | County | 2026 Pop. ↓ |
|---|---|---|
| Falmouth | Cumberland County | 13,012 |
| Freeport | Cumberland County | 8,973 |
| Farmington | Franklin County | 8,211 |
| Fairfield | Somerset County | 6,534 |
| Fort Kent | Aroostook County | 4,130 |
| Fryeburg | Oxford County | 3,603 |
| Fort Fairfield | Aroostook County | 3,261 |
| Farmingdale | Kennebec County | 2,991 |
| Franklin | Hancock County | 1,679 |
| Fayette | Kennebec County | 1,297 |
| Frankfort | Waldo County | 1,244 |
| Friendship | Knox County | 1,166 |
| Frenchville | Aroostook County | 1,008 |
| Freedom | Waldo County | 756 |
| Frenchboro | Hancock County | 31 |
| Frye Island | Cumberland County | 25 |