| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Selma | 1 | 15,706 | 17,824 | -2.31% | 1,137 | 14 | City |
| Valley Grande | 2 | 3,844 | 4,173 | -1.51% | 115 | 34 | City |
| Orrville | 3 | 137 | 152 | -2.14% | 132 | 1 | Town |
| Benton | 4 | 35 | 41 | -2.78% | 116 | 0 | Town |
Selma is the largest city in Dallas County, with a population of 15,706.
Benton is the smallest city in Dallas County, with a population of 35.
There are 4 cities in Dallas County, Alabama.