5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Edgefield | 1 | 4,145 | 3,910 | 1.15% | 957 | 4.33 | Town |
| Johnston | 2 | 2,224 | 2,001 | 2.07% | 849 | 2.62 | Town |
| McCormick | 3 | 1,983 | 2,218 | -2.31% | 489 | 4.05 | Town |
| Trenton | 4 | 216 | 196 | 1.89% | 167 | 1.29 | Town |
| Willington | 5 | 64 | 0 | -8.57% | 11 | 5.96 | CDP |
Edgefield is the largest city in Edgefield County, with a population of 4,145.
Willington is the smallest city in Edgefield County.
There are 5 cities in Edgefield County, South Carolina.