Abbeville County is a county located in the U.S. state of South Carolina. As of the 2020 census, its population was 24,295. Its county seat is Abbeville. It is the first county in the United States alphabetically. Abbeville County included in the Greenville-Spartanburg-Anderson, SC Combined Statistical Area, known colloquially as the Upstate or the Upcountry.

Abbeville is a city and county seat of Abbeville County, in the U.S. state of South Carolina. It is located 86 miles (138 km) west of Columbia and 45 miles (72 km) south of Greenville. Its population was 5,237 at the 2010 census. Settled by French Huguenot settlers, it was named, along with the county, for the French town of the same name.