12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dentsville | 1 | 16,983 | 15,537 | 1.16% | 2,538 | 6.69 | CDP |
| Irmo | 2 | 12,315 | 11,609 | 1.16% | 1,753 | 7.03 | Town |
| Forest Acres | 3 | 10,239 | 10,581 | -0.66% | 2,214 | 4.62 | City |
| Woodfield | 4 | 9,507 | 9,361 | 0.15% | 3,491 | 2.72 | CDP |
| Blythewood | 5 | 7,202 | 4,864 | 6.95% | 678 | 10.63 | Town |
| Capitol View | 6 | 4,364 | 3,604 | 7.14% | 2,700 | 1.62 | CDP |
| Arthurtown | 7 | 3,759 | 2,793 | 7.16% | 2,020 | 1.86 | CDP |
| Olympia | 8 | 1,533 | 1,098 | 7.2% | 2,144 | 0.71 | CDP |
| Hopkins | 9 | 1,452 | 2,068 | -6.14% | 88 | 16.51 | CDP |
| Gadsden | 10 | 1,308 | 983 | -1.65% | 114 | 11.51 | CDP |
| Arcadia Lakes | 11 | 846 | 865 | -0.47% | 1,519 | 0.56 | Town |
| Eastover | 12 | 623 | 617 | 0.16% | 513 | 1.21 | Town |
Dentsville is the largest city in Richland County, with a population of 16,983.
Eastover is the smallest city in Richland County.
There are 12 cities in Richland County, South Carolina.