Founded in 1800, Marion County is one of 46 counties in the state of South Carolina. Historically, Marion County was formed from Georgetown. The city of Marion is the county seat. With FIPS code of 67, Marion County has a population of 28,784 and area of 494 square miles (1,279 km2).
List of all cities in Marion County, SC alphabetically
| City/Town | Postal Code | Area Code |
| Brittons Neck, SC | 29546 | 843 |
| Centenary, SC | 29519 | 843 |
| Gresham, SC | 29546 | 843 |
| Marion, SC | 29571 | 843 |
| Mullins, SC | 29574 | 843 |
| Rains, SC | 29589 | 843 |
| Sellers, SC | 29592 | 843 |