| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Winnsboro | 1 | 3,282 | 3,424 | -0.7% | 574 | 6 | Town |
| Ridgeway | 2 | 252 | 266 | -0.79% | 520 | 0 | Town |
| Jenkinsville | 3 | 39 | 40 | -2.5% | 438 | 0 | Town |
Winnsboro is the largest city in Fairfield County, with a population of 3,282.
Jenkinsville is the smallest city in Fairfield County, with a population of 39.
There are 3 cities in Fairfield County, South Carolina.