22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Farmington town | 1 | 8,589 | 7,588 | 0.96% | 154 | 55.68 | Town |
| Jay town | 2 | 4,654 | 4,621 | 0% | 96 | 48.38 | Town |
| Wilton town | 3 | 3,884 | 3,832 | 0.15% | 94 | 41.26 | Town |
| New Sharon town | 4 | 1,611 | 1,459 | 2.03% | 35 | 46.19 | Town |
| Chesterville town | 5 | 1,386 | 1,332 | 0.73% | 38 | 36.18 | Town |
| Rangeley town | 6 | 1,354 | 1,223 | 2.19% | 33 | 41.48 | Town |
| Strong town | 7 | 1,124 | 1,120 | -0.09% | 40 | 28.35 | Town |
| Kingfield town | 8 | 1,029 | 964 | 1.38% | 24 | 43.12 | Town |
| Chisholm | 9 | 998 | 1,165 | -2.44% | 457 | 2.19 | CDP |
| Phillips town | 10 | 936 | 899 | 0.43% | 18 | 50.80 | Town |
| Industry town | 11 | 809 | 788 | 0.5% | 27 | 29.85 | Town |
| New Vineyard town | 12 | 761 | 722 | 0.4% | 21 | 35.74 | Town |
| Carrabassett Valley town | 13 | 719 | 674 | 1.27% | 9 | 77.48 | Town |
| Eustis town | 14 | 672 | 643 | 0.15% | 17 | 39.12 | Town |
| Temple town | 15 | 555 | 529 | 0.91% | 16 | 35.52 | Town |
| Carthage town | 16 | 517 | 506 | 0.39% | 16 | 33.33 | Town |
| Weld town | 17 | 488 | 376 | 7.25% | 8 | 59.50 | Town |
| Avon town | 18 | 449 | 449 | -0.22% | 11 | 41.39 | Town |
| Dallas plantation | 19 | 312 | 310 | 0% | 8 | 39.01 | Plantation |
| Rangeley plantation | 20 | 182 | 181 | 0% | 4 | 40.77 | Plantation |
| Coplin plantation | 21 | 132 | 131 | 0% | 4 | 33.04 | Plantation |
| Sandy River plantation | 22 | 128 | 127 | 0% | 4 | 34.09 | Plantation |
Farmington town is the largest city in Franklin County, with a population of 8,589.
Sandy River plantation is the smallest city in Franklin County.
There are 22 cities in Franklin County, Maine.