Summerton is a town in Clarendon County, South Carolina, United States. The population was 1,000 at the 2010 census.
Summerton is in southwestern Clarendon County at 33°36′19″N 80°21′8″W (33.605145, -80.352159). Interstate 95 passes just south of the town, with access from Exit 108. I-95 leads northeast 57 miles (92 km) to Florence and southwest 120 miles (190 km) to Savannah, Georgia. U.S. Routes 15 and 301 join in the center of Summerton. US 301 leads northeast 10 miles (16 km) to Manning, the Clarendon County seat, and US 15 leads north 23 miles (37 km) to Sumter, while the combined highways lead southwest 11 miles (18 km) to Santee.
Summerton is located in the heart of Santee Cooper Country, 8 miles (13 km) from the shores of Lake Marion.
According to the United States Census Bureau, Summerton has a total area of 1.3 square miles (3.3 km2), all land.
As of the census of 2000, there were 1,061 people, 452 households, and 285 families residing in the town. The population density was 919.3 people per square mile (356.2/km2). There were 516 housing units at an average density of 447.1 per square mile (173.2/km2).