11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aiken | 1 | 32,962 | 32,158 | 0.41% | 1,494 | 22 | City |
| North Augusta | 2 | 27,349 | 24,486 | 1.78% | 1,272 | 21 | City |
| Batesburg-Leesville | 3 | 5,348 | 5,267 | 0.26% | 653 | 8 | Town |
| Burnettown | 4 | 3,312 | 3,054 | 1.32% | 601 | 6 | Town |
| New Ellenton | 5 | 2,423 | 2,216 | 1.47% | 546 | 4 | Town |
| Jackson | 6 | 1,689 | 1,527 | 1.62% | 480 | 4 | Town |
| Wagener | 7 | 714 | 645 | 1.71% | 526 | 1 | Town |
| Salley | 8 | 359 | 334 | 1.13% | 469 | 1 | Town |
| Perry | 9 | 216 | 194 | 1.89% | 225 | 1 | Town |
| Monetta | 10 | 212 | 197 | 1.44% | 307 | 1 | Town |
| Windsor | 11 | 126 | 113 | 1.61% | 144 | 1 | Town |
Aiken is the largest city in Aiken County, with a population of 32,962.
Windsor is the smallest city in Aiken County, with a population of 126.
There are 11 cities in Aiken County, South Carolina.