Founded in 1785, Darlington County is one of 46 counties in the state of South Carolina. Historically, Darlington County was formed from Cheraws District. The city of Darlington is the county seat. With FIPS code of 31, Darlington County has a population of 62,755 and area of 567 square miles (1,469 km2).
List of all cities in Darlington County, SC alphabetically
| City/Town | Postal Code | Area Code |
| Cypress Crossroads, SC | 29069 | 843 |
| Darlington, SC | 29532 | 843 |
| 29540 | 843 | |
| Hartsville, SC | 29550 | 843 |
| 29551 | 843 | |
| Lamar, SC | 29069 | 843 |
| Lydia, SC | 29079 | 843 |
| Oats, SC | 29069 | 843 |
| Society Hill, SC | 29593 | 843 |