Founded in 1785, Fairfield County is one of 46 counties in the state of South Carolina. Historically, Fairfield County was formed from Camden District. The city of Winnsboro is the county seat. With FIPS code of 39, Fairfield County has a population of 20,690 and area of 710 square miles (1,839 km2).
List of all cities in Fairfield County, SC alphabetically
| City/Town | Postal Code | Area Code |
| Blair, SC | 29015 | 803 |
| Greenbrier, SC | 29180 | 803 |
| Jenkinsville, SC | 29065 | 803 |
| Longtown, SC | 29130 | 803 |
| Monticello, SC | 29065 | 803 |
| Ridgeway, SC | 29130 | 803 |
| Rion, SC | 29132 | 803 |
| Smallwood, SC | 29130 | 803 |
| White Oak, SC | 29180 | 803 |
| Winnsboro, SC | 29180 | 803 |
| Winnsboro Mills, SC | 29180 | 803 |