There are 11 US Post Offices in Oconee County serving a total of 62,601 residents equating to 5,691 residents per post office. It's estimated that approximately 99,918 packages are handled across the 11 county post offices annually. Oconee County is the westernmost county in the U.S. state of South Carolina. As of the 2010 census, the population was 74,273. Its county seat is Walhalla. Oconee County is included in the Seneca, SC Micropolitan Statistical Area, which is also included in the Greenville-Spartanburg-Anderson, SC Combined Statistical Area. South Carolina Highway 11, the Cherokee Foothills National Scenic Highway, begins in southern Oconee County at Interstate Highway 85 at the Georgia state line."