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What are the largest counties in South Carolina?

Greenville County is the largest county in South Carolina, with 583,125 residents in 2025 (Census PEP). Charleston County (436,200) and Richland County (434,956) come next.

Data as of 2025 · updated

See the rankingAll South Carolina counties

All 46 ranked South Carolina counties

South Carolina counties ranked by population
RankCountyResidents 2025Change 2020–25
1Greenville County583,125+10.6%
2Charleston County436,200+6.4%
3Richland County434,956+4.6%
4Horry County427,551+20.9%
5Spartanburg County380,857+15.6%
6Lexington County317,588+7.7%
7York County306,887+8.1%
8Berkeley County274,666+18.7%
9Anderson County219,930+7.7%
10Beaufort County204,433+8.8%
11Aiken County181,515+7.3%
12Dorchester County178,397+10.1%
13Pickens County139,198+5.7%
14Florence County138,504+1.2%
15Lancaster County114,296+18.3%
16Sumter County105,067−0.3%
17Oconee County83,775+6.3%
18Orangeburg County83,177−0.9%
19Kershaw County73,166+11.6%
20Laurens County71,848+6.2%
21Greenwood County70,379+1.5%
22Georgetown County65,912+3.8%
23Darlington County62,888+0.1%
24Cherokee County58,275+3.6%
25Chesterfield County44,740+3.4%
26Newberry County39,561+4.8%
27Colleton County39,382+2.2%
28Jasper County38,533+32.2%
29Chester County33,001+2.2%
30Clarendon County31,043+0.7%
31Edgefield County29,808+16.1%
32Williamsburg County29,662−4.0%
33Marion County28,242−2.9%
34Dillon County27,458−2.9%
35Union County26,799−1.4%
36Marlboro County25,488−3.8%
37Abbeville County24,836+2.3%
38Barnwell County20,653+0.4%
39Fairfield County20,340−2.6%
40Saluda County19,680+4.0%
41Hampton County18,174−1.9%
42Lee County15,730−5.0%
43Calhoun County14,188+0.5%
44Bamberg County12,796−3.5%
45McCormick County10,215+7.3%
46Allendale County7,355−7.4%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

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Questions

What is the largest county in South Carolina?

Greenville County is the largest county in South Carolina, with 583,125 residents in 2025 (Census PEP). Charleston County (436,200) and Richland County (434,956) come next.

How is this ranking calculated?

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

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