| Post Office | Barnwell |
| Division | Barnwell |
| Pincode | 29812 |
| Post Office | Williston |
| Division | Barnwell |
| Pincode | 29853 |
| Post Office | Blackville |
| Division | Barnwell |
| Pincode | 29817 |
| Post Office | Elko |
| Division | Barnwell |
| Pincode | 29826 |
| Post Office | Hilda |
| Division | Barnwell |
| Pincode | 29813 |
5 City in Barnwell | List of Zip Codes Location In South Carolina and Your selected County Barnwell
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