- County Seat
- Barnwell
- Population
- 21,483
- Square Mileage
- 557
- Office Telephone
- 803-541-1052
- Fax
- 803-259-9683
- Detention Center
- 803-541-1102
- Address
- P.O. Box 384
Barnwell, SC 29812
Barnwell County is highlighted. Select any county to see its sheriff.
Barnwell County is highlighted. Select any county to see its sheriff.