11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aiken | 1 | 32,828 | 32,158 | 0.41% | 1,488 | 22 | City |
| North Augusta | 2 | 26,872 | 24,486 | 1.81% | 1,250 | 21 | City |
| Batesburg-Leesville | 3 | 5,334 | 5,267 | 0.24% | 651 | 8 | Town |
| Burnettown | 4 | 3,269 | 3,054 | 1.33% | 593 | 6 | Town |
| New Ellenton | 5 | 2,388 | 2,216 | 1.44% | 538 | 4 | Town |
| Jackson | 6 | 1,662 | 1,527 | 1.65% | 472 | 4 | Town |
| Wagener | 7 | 702 | 645 | 1.59% | 517 | 1 | Town |
| Salley | 8 | 355 | 334 | 1.14% | 463 | 1 | Town |
| Perry | 9 | 212 | 194 | 1.44% | 221 | 1 | Town |
| Monetta | 10 | 209 | 197 | 0.97% | 303 | 1 | Town |
| Windsor | 11 | 124 | 113 | 1.64% | 142 | 1 | Town |
Aiken is the largest city in Aiken County, with a population of 32,828.
Windsor is the smallest city in Aiken County, with a population of 124.
There are 11 cities in Aiken County, South Carolina.