6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Russellville | 1 | 10,635 | 10,852 | -0.4% | 793 | 13.41 | City |
| Red Bay | 2 | 3,152 | 3,231 | -0.51% | 323 | 9.75 | City |
| Phil Campbell | 3 | 973 | 987 | -0.31% | 226 | 4.31 | Town |
| Vina | 4 | 321 | 323 | 0% | 67 | 4.80 | Town |
| Hodges | 5 | 261 | 263 | 0% | 63 | 4.13 | Town |
| Spruce Pine | 6 | 81 | 73 | -10% | 87 | 0.93 | CDP |
Russellville is the largest city in Franklin County, with a population of 10,635.
Spruce Pine is the smallest city in Franklin County.
There are 6 cities in Franklin County, Alabama.