There are 8 US Post Offices in Newberry County serving a total of 39,124 residents equating to 4,891 residents per post office. It's estimated that approximately 62,446 packages are handled across the 8 county post offices annually. Newberry County is a county located in the U.S. state of South Carolina. As of the 2010 census, its population was 37,508. Its county seat is Newberry. The name is of unknown origin. Newberry County comprises the Newberry, SC Micropolitan Statistical Area"