8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ozark | 1 | 3,620 | 3,544 | 0.42% | 456 | 7.93 | City |
| Charleston | 2 | 2,756 | 2,591 | 1.21% | 719 | 3.83 | City |
| Altus | 3 | 679 | 668 | 0.29% | 359 | 1.89 | City |
| Branch | 4 | 307 | 301 | 0.33% | 98 | 3.12 | City |
| Denning | 5 | 209 | 199 | 0.97% | 194 | 1.08 | Town |
| Caulksville | 6 | 156 | 155 | 0% | 116 | 1.35 | Town |
| Alix | 7 | 91 | 77 | 7.06% | 189 | 0.48 | CDP |
| Wiederkehr Village | 8 | 47 | 46 | 0% | 11 | 4.24 | City |
Ozark is the largest city in Franklin County, with a population of 3,620.
Wiederkehr Village is the smallest city in Franklin County.
There are 8 cities in Franklin County, Arkansas.