Sponsored Listings:
Barnwell Post Office
221 Main St
Barnwell, South Carolina 29812
Blackville Post Office
476 Main St
Blackville, South Carolina 29817
Elko Post Office
10049 Us Highway 78
Elko, South Carolina 29826
Williston Post Office
12926 Main St
Williston, South Carolina 29853
Barnwell County
There are 4 US Post Offices in Barnwell County serving a total of 23,521 residents equating to 5,880 residents per post office. It's estimated that approximately 37,542 packages are handled across the 4 county post offices annually. Barnwell County is a county located in the U.S. state of South Carolina. As of the 2010 census, its population was 22,621. Its county seat is Barnwell.