Clarendon County, South Carolina

Clarendon County
Clarendon County Courthouse
Location within the U.S. state of South Carolina
South Carolina's location within the U.S.
Coordinates: 33°40′N 80°13′W / 33.66°N 80.22°W / 33.66; -80.22
Country United States
State South Carolina
Founded1785
Named afterEdward Hyde, 1st Earl of Clarendon
SeatManning
Largest communityManning
Area
  Total
695.67 sq mi (1,801.8 km2)
  Land607.21 sq mi (1,572.7 km2)
  Water88.46 sq mi (229.1 km2)  12.72%
Population
 (2020)
  Total
31,144
  Estimate 
(2023)
31,004
  Density45/sq mi (17/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district6th
Websitewww.clarendoncountygov.org

Clarendon County is a county located below the fall line in the Coastal Plain region of U.S. state of South Carolina. As of the 2020 census, its population was 31,144. Its county seat is Manning.

This area was developed for lumber and mills, including textile mills. Clarendon County boasts one of the largest man-made lakes in the United States, Lake Marion, completed in 1941 as a New Deal project. It was planned as part of a national rural electrification initiative. Since the late 20th century, the dam's generation of hydroelectric power has also stimulated economic development and industry in the region.

The South Carolina state legislature established racial segregation of public facilities by state law in the late 19th century. During the Civil Rights Movement, Clarendon County was the site of the Briggs v. Elliott trial challenging segregation of public schools. This case was one of five combined with what came to be known as Brown v. Board of Education, under which the United States Supreme Court ruled in 1954 that racial segregation of public schools was unconstitutional.