| Business | Phone |
| Barnwell County Circuit Court 141 Main St # 120, Barnwell 29812 | (803) 541-1027 |
| Barnwell County Court Room Office Barnwell County Courthouse, Barnwell 29812 | (803) 541-1036 |
| Barnwell County Family Court 100 Main St # 208, Barnwell 29812 | (803) 541-1033 |
| Barnwell County Family Court 141 Main St, Barnwell 29812 | (803) 541-1033 |
| Barnwell County Magistrate Allen & Calhoun Stamp;, Barnwell 29812 | (803) 541-1035 |
| Barnwell County Probate Judge 141 Main St, Barnwell 29812 | (803) 541-1031 |