5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Selma | 1 | 15,934 | 17,824 | -2.32% | 1,154 | 14 | City |
| Valley Grande | 2 | 3,850 | 4,168 | -1.64% | 115 | 34 | City |
| Selmont-West Selmont | 3 | 1,700 | 1,855 | -3.63% | 519 | 3 | CDP |
| Orrville | 4 | 137 | 152 | -2.14% | 132 | 1 | Town |
| Benton | 5 | 36 | 41 | -2.7% | 119 | 0 | Town |
Selma is the largest city in Dallas County, with a population of 15,934.
Benton is the smallest city in Dallas County, with a population of 36.
There are 5 cities in Dallas County, Alabama.