Population of Counties in South Carolina (2020)

As of 2019, South Carolina's most populous county is Greenville County, home of Greenville, with a population of 506,837. This represents growth of 11.95% since the last census. Greenville is followed by Richland County (411,592), Charleston County (401,438), Horry County (333,268), and Spartansburg County (306,854). These are the only counties of South Carolina with a population of more than 300,000 and all have experienced population growth of at least 6%. Of these counties, Horry County has experienced the most rapid growth of 23.23% since the census.

South Carolina Counties with Fewest Residents

The least populated county in South Carolina is Allendale County with a population of 9,002, down 13.02% from the 2010 census. McCormick County follows closely behind at 9,545 residents which represents a population growth of -6.54%. Other small counties in South Carolina with fewer than 15,000 people are Bamberg County (14,381) and Calhoun County (14,704). Both counties have also experienced negative population growth. All six counties in South Carolina with fewer than 20,000 residents have declined in population since the census.

South Carolina Counties with Rapid Growth

Horry County, the 4th most populated county in South Carolina, has experienced the most rapid growth since the census at 23.23% to a population of 333,268. Two other counties topped 20% growth: Berkeley County (21.77%) and Lancaster County (20.24%). Only five other counties experienced growth above 12%: York County (17.44%), Beaufort County (14.74%), Charleston County (14.36%), Jasper County (14.15%), and Dorchester County (13.81%).

Name 2020 Population Growth Since 2010
Greenville County529,53516.98%
Richland County420,7869.08%
Charleston County414,23918.03%
Horry County367,13935.85%
Spartanburg County328,40015.33%
Lexington County303,46015.24%
York County290,06227.86%
Berkeley County234,33330.61%
Anderson County204,9109.51%
Beaufort County193,16118.62%
Aiken County171,6916.95%
Dorchester County164,17919.79%
Florence County137,4510.23%
Pickens County127,4376.80%
Sumter County106,508-1.03%
Lancaster County100,89231.08%
Orangeburg County85,456-7.44%
Oconee County80,2487.95%
Greenwood County71,0491.81%
Laurens County67,1520.94%
Kershaw County66,5927.92%
Darlington County66,340-3.18%
Georgetown County63,0654.50%
Cherokee County57,3843.33%
Chesterfield County45,422-2.58%
Newberry County38,7042.91%
Colleton County37,792-2.84%
Clarendon County33,100-5.29%
Chester County32,183-2.93%
Dillon County30,695-4.31%
Marion County30,533-7.36%
Jasper County30,11720.80%
Williamsburg County29,448-14.26%
Edgefield County27,6122.37%
Union County27,234-5.86%
Marlboro County25,790-10.81%
Abbeville County24,503-3.19%
Fairfield County21,982-7.80%
Saluda County20,7844.36%
Barnwell County20,624-8.89%
Hampton County19,051-9.59%
Lee County16,892-12.06%
Calhoun County14,174-6.10%
Bamberg County14,031-12.06%
McCormick County9,096-10.94%
Allendale County8,707-15.91%