7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ozark | 1 | 3,631 | 3,540 | 0.41% | 458 | 8 | City |
| Charleston | 2 | 2,800 | 2,593 | 1.27% | 730 | 4 | City |
| Altus | 3 | 677 | 668 | 0.3% | 325 | 2 | City |
| Branch | 4 | 310 | 301 | 0.65% | 99 | 3 | City |
| Denning | 5 | 209 | 199 | 0.97% | 194 | 1 | Town |
| Caulksville | 6 | 164 | 158 | 0.61% | 122 | 1 | Town |
| Wiederkehr Village | 7 | 49 | 48 | 0% | 12 | 4 | City |
Ozark is the largest city in Franklin County, with a population of 3,631.
Wiederkehr Village is the smallest city in Franklin County, with a population of 49.
There are 7 cities in Franklin County, Arkansas.