RANKING · 2020 CENSUS · 46 SHOWN OF 46

Most densely populated, South Carolina counties · 2020

South Carolina counties ranked by residents per square mile (2023). This list covers the 46 counties in South Carolina that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Greenville County, SCSC583,125669+38%

02Richland County, SCSC434,956550+30%

03Charleston County, SCSC436,200445+32%

04Lexington County, SCSC317,588421+36%

05York County, SCSC306,887414+71%

06Spartanburg County, SCSC380,857406+29%

07Beaufort County, SCSC204,433325+55%

08Horry County, SCSC427,551310+79%

09Anderson County, SCSC219,930285+23%

10Dorchester County, SCSC178,397284+68%

11Pickens County, SCSC139,198264+19%

12Berkeley County, SCSC274,666208+61%

13Lancaster County, SCSC114,296175+57%

14Florence County, SCSC138,504171+9%

15Sumter County, SCSC105,067159+1%

16Aiken County, SCSC181,515158+18%

17Greenwood County, SCSC70,379152+5%

18Cherokee County, SCSC58,275143+7%

19Oconee County, SCSC83,775125+19%

20Darlington County, SCSC62,888112−7%

21Laurens County, SCSC71,84895−3%

22Kershaw County, SCSC73,16690+24%

23Georgetown County, SCSC65,91278+14%

24Orangeburg County, SCSC83,17776−8%

25Dillon County, SCSC27,45870−8%

26Newberry County, SCSC39,56160+4%

27Marion County, SCSC28,24260−18%

28Chester County, SCSC33,00156−5%

29Marlboro County, SCSC25,48856−7%

30Chesterfield County, SCSC44,74054+1%

31Union County, SCSC26,79953−9%

32Clarendon County, SCSC31,04351−4%

33Edgefield County, SCSC29,80851+4%

34Abbeville County, SCSC24,83649−7%

35Jasper County, SCSC38,53344+39%

36Saluda County, SCSC19,68042−2%

37Lee County, SCSC15,73040−18%

38Barnwell County, SCSC20,65338−12%

39Calhoun County, SCSC14,18837−7%

40Colleton County, SCSC39,38237+1%

41Bamberg County, SCSC12,79634−20%

42Williamsburg County, SCSC29,66233−17%

43Hampton County, SCSC18,17433−13%

44Fairfield County, SCSC20,34031−11%

45McCormick County, SCSC10,21527−4%

46Allendale County, SCSC7,35520−28%

SHOWING 1–46 OF 46

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES