34 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Amherst Town | 1 | 48,597 | 27,796 | 9.36% | 1,759 | 27.62 | City |
| Greenfield | 2 | 17,574 | 17,709 | -0.15% | 821 | 21.41 | City |
| Montague town | 3 | 8,378 | 8,568 | -0.39% | 278 | 30.15 | Town |
| Orange town | 4 | 7,536 | 7,563 | -0.15% | 215 | 35.06 | Town |
| Deerfield town | 5 | 5,198 | 5,092 | 0.21% | 160 | 32.40 | Town |
| Turners Falls | 6 | 3,680 | 3,682 | -1.42% | 1,936 | 1.90 | CDP |
| Orange | 7 | 3,659 | 3,882 | -0.65% | 611 | 5.99 | CDP |
| Sunderland town | 8 | 3,606 | 3,655 | -0.41% | 254 | 14.22 | Town |
| Northfield town | 9 | 2,839 | 2,862 | -0.42% | 83 | 34.26 | Town |
| Bernardston town | 10 | 2,113 | 2,099 | 0% | 90 | 23.39 | Town |
| South Deerfield | 11 | 1,971 | 2,150 | 0.31% | 625 | 3.15 | CDP |
| Shelburne town | 12 | 1,856 | 1,884 | -0.59% | 80 | 23.16 | Town |
| Leverett town | 13 | 1,851 | 1,857 | -0.27% | 81 | 22.79 | Town |
| Buckland town | 14 | 1,801 | 1,813 | -0.22% | 92 | 19.67 | Town |
| Conway town | 15 | 1,760 | 1,767 | -0.06% | 47 | 37.72 | Town |
| Shutesbury town | 16 | 1,707 | 1,720 | -0.41% | 64 | 26.51 | Town |
| Shelburne Falls | 17 | 1,691 | 1,659 | -0.18% | 643 | 2.63 | CDP |
| Ashfield town | 18 | 1,684 | 1,687 | -0.18% | 42 | 39.99 | Town |
| Erving town | 19 | 1,655 | 1,657 | -0.24% | 120 | 13.79 | Town |
| Colrain town | 20 | 1,647 | 1,603 | 0.55% | 38 | 43.08 | Town |
| Whately town | 21 | 1,621 | 1,616 | -0.12% | 80 | 20.16 | Town |
| Gill town | 22 | 1,540 | 1,550 | -0.39% | 112 | 13.77 | Town |
| Charlemont town | 23 | 1,167 | 1,183 | -0.43% | 44 | 26.25 | Town |
| Millers Falls | 24 | 1,042 | 1,158 | -0.57% | 1,141 | 0.91 | CDP |
| New Salem town | 25 | 1,026 | 982 | 0.59% | 23 | 44.76 | Town |
| Wendell town | 26 | 915 | 928 | -0.33% | 29 | 31.85 | Town |
| Northfield | 27 | 863 | 970 | -1.71% | 194 | 4.45 | CDP |
| Warwick town | 28 | 770 | 782 | -0.39% | 21 | 37.35 | Town |
| Leyden town | 29 | 725 | 731 | -0.41% | 40 | 17.94 | Town |
| Heath town | 30 | 716 | 722 | -0.28% | 29 | 24.90 | Town |
| Deerfield | 31 | 447 | 525 | -2.83% | 243 | 1.84 | CDP |
| Rowe town | 32 | 417 | 423 | -0.48% | 18 | 23.44 | Town |
| Hawley town | 33 | 349 | 354 | -0.57% | 11 | 30.49 | Town |
| Monroe town | 34 | 113 | 116 | -0.88% | 11 | 10.69 | Town |
Amherst Town is the largest city in Franklin County, with a population of 48,597.
Monroe town is the smallest city in Franklin County.
There are 34 cities in Franklin County, Massachusetts.