19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aiken | 1 | 33,485 | 32,139 | 0.81% | 1,547 | 21.65 | City |
| North Augusta | 2 | 26,827 | 24,487 | 1.78% | 1,260 | 21.29 | City |
| Belvedere | 3 | 5,784 | 5,557 | -0.02% | 1,690 | 3.42 | CDP |
| Batesburg-Leesville | 4 | 5,321 | 5,261 | 0.23% | 649 | 8.20 | Town |
| Burnettown | 5 | 3,277 | 3,056 | 1.36% | 595 | 5.51 | Town |
| Gloverville | 6 | 3,166 | 3,008 | 0.7% | 873 | 3.63 | CDP |
| Clearwater | 7 | 3,161 | 4,060 | -2.5% | 754 | 4.19 | CDP |
| Graniteville | 8 | 2,428 | 2,566 | -0.49% | 734 | 3.31 | CDP |
| New Ellenton | 9 | 2,391 | 2,216 | 1.49% | 539 | 4.44 | Town |
| Langley | 10 | 1,858 | 2,179 | 1.47% | 1,636 | 1.14 | CDP |
| Beech Island | 11 | 1,701 | 1,165 | 7.12% | 346 | 4.92 | CDP |
| Jackson | 12 | 1,655 | 1,527 | 1.6% | 470 | 3.52 | Town |
| Murphys Estates | 13 | 1,486 | 1,563 | 0.2% | 724 | 2.05 | CDP |
| Wagener | 14 | 698 | 642 | 1.6% | 514 | 1.36 | Town |
| Warrenville | 15 | 674 | 740 | -5.34% | 622 | 1.08 | CDP |
| Salley | 16 | 358 | 335 | 1.42% | 467 | 0.77 | Town |
| Perry | 17 | 214 | 194 | 1.9% | 223 | 0.96 | Town |
| Monetta | 18 | 208 | 197 | 0.97% | 301 | 0.69 | Town |
| Windsor | 19 | 124 | 113 | 1.64% | 142 | 0.87 | Town |
Aiken is the largest city in Aiken County, with a population of 33,485.
Windsor is the smallest city in Aiken County.
There are 19 cities in Aiken County, South Carolina.