19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aiken | 1 | 32,828 | 32,158 | 0.41% | 1,516 | 22 | City |
| North Augusta | 2 | 26,872 | 24,486 | 1.81% | 1,262 | 21 | City |
| Belvedere | 3 | 5,784 | 5,557 | -0.02% | 1,690 | 3 | CDP |
| Batesburg-Leesville | 4 | 5,334 | 5,267 | 0.24% | 651 | 8 | Town |
| Burnettown | 5 | 3,269 | 3,054 | 1.33% | 593 | 6 | Town |
| Gloverville | 6 | 3,166 | 3,008 | 0.7% | 873 | 4 | CDP |
| Clearwater | 7 | 3,161 | 4,060 | -2.5% | 754 | 4 | CDP |
| Graniteville | 8 | 2,428 | 2,566 | -0.49% | 734 | 3 | CDP |
| New Ellenton | 9 | 2,388 | 2,216 | 1.44% | 538 | 4 | Town |
| Langley | 10 | 1,858 | 2,179 | 1.47% | 1,636 | 1 | CDP |
| Beech Island | 11 | 1,701 | 1,165 | 7.12% | 346 | 5 | CDP |
| Jackson | 12 | 1,662 | 1,527 | 1.65% | 472 | 4 | Town |
| Murphys Estates | 13 | 1,486 | 1,563 | 0.2% | 724 | 2 | CDP |
| Wagener | 14 | 702 | 645 | 1.59% | 517 | 1 | Town |
| Warrenville | 15 | 674 | 740 | -5.34% | 622 | 1 | CDP |
| Salley | 16 | 355 | 334 | 1.14% | 463 | 1 | Town |
| Perry | 17 | 212 | 194 | 1.44% | 221 | 1 | Town |
| Monetta | 18 | 209 | 197 | 0.97% | 303 | 1 | Town |
| Windsor | 19 | 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 19 cities in Aiken County, South Carolina.