| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ozark | 1 | 3,646 | 3,530 | 0.5% | 460 | 8 | City |
| Charleston | 2 | 2,795 | 2,585 | 1.27% | 729 | 4 | City |
| Altus | 3 | 683 | 672 | 0.29% | 328 | 2 | City |
| Branch | 4 | 316 | 305 | 0.64% | 101 | 3 | City |
| Denning | 5 | 210 | 199 | 0.48% | 195 | 1 | Town |
| Caulksville | 6 | 160 | 154 | 0.63% | 119 | 1 | Town |
| Wiederkehr Village | 7 | 39 | 38 | 0% | 9.0 | 4 | City |
Ozark is the largest city in Franklin County, with a population of 3,646.
Wiederkehr Village is the smallest city in Franklin County, with a population of 39.
There are 7 cities in Franklin County, Arkansas.