16 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Falmouth | Cumberland County | 12,931 |
| Freeport | Cumberland County | 8,993 |
| Farmington | Franklin County | 8,158 |
| Fairfield | Somerset County | 6,538 |
| Fort Kent | Aroostook County | 4,109 |
| Fryeburg | Oxford County | 3,601 |
| Fort Fairfield | Aroostook County | 3,247 |
| Farmingdale | Kennebec County | 3,035 |
| Franklin | Hancock County | 1,692 |
| Fayette | Kennebec County | 1,293 |
| Frankfort | Waldo County | 1,240 |
| Friendship | Knox County | 1,150 |
| Frenchville | Aroostook County | 1,014 |
| Freedom | Waldo County | 754 |
| Frye Island | Cumberland County | 31 |
| Frenchboro | Hancock County | 30 |