RANKING · 2024 ACS · 66 SHOWN OF 66

Oldest by median age, South Dakota counties

South Dakota counties ranked by median age of residents (2024 ACS). This list covers the 66 counties in South Dakota that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Custer County, SDSD9,43157.6+33%

02Fall River County, SDSD7,46755.3+22%

03Hyde County, SDSD1,19153.7+27%

04Campbell County, SDSD1,37750.9+21%

05McPherson County, SDSD2,34750.0+5%

06Potter County, SDSD2,37749.9+9%

07Miner County, SDSD2,28148.4+14%

08Haakon County, SDSD1,80247.9+16%

09Jerauld County, SDSD1,65446.9+1%

10Sully County, SDSD1,47946.9+17%

11Harding County, SDSD1,33146.3+23%

12Spink County, SDSD6,15545.5+14%

13Tripp County, SDSD5,70845.0+14%

14Day County, SDSD5,48444.8+4%

15Lawrence County, SDSD29,45944.8+20%

16Gregory County, SDSD4,03744.7+1%

17Grant County, SDSD7,53444.5+10%

18Stanley County, SDSD3,01844.5+18%

19Edmunds County, SDSD4,02244.0+6%

20Perkins County, SDSD2,85344.0+2%

21Lake County, SDSD10,99343.8+20%

22Faulk County, SDSD2,17842.9+3%

23Hand County, SDSD3,12142.5−3%

24Marshall County, SDSD4,42642.5+2%

25Yankton County, SDSD23,63542.5+15%

26Bon Homme County, SDSD7,24442.1+4%

27Hutchinson County, SDSD7,41342.1−2%

28Kingsbury County, SDSD5,28442.1−1%

29Douglas County, SDSD2,88842.0+0%

30Deuel County, SDSD4,40841.8+2%

31Aurora County, SDSD2,80141.7+3%

32Walworth County, SDSD5,21741.7−3%

33Brule County, SDSD5,27841.5+12%

34Union County, SDSD17,40241.5+12%

35Turner County, SDSD9,31441.2+2%

36Moody County, SDSD6,63240.8+10%

37Codington County, SDSD29,56240.4+14%

38Clark County, SDSD4,03140.3−3%

39Butte County, SDSD10,85640.2+6%

40Pennington County, SDSD116,79240.1+15%

41Sanborn County, SDSD2,38840.1−2%

42Davison County, SDSD20,06939.6+10%

43Hughes County, SDSD17,57039.5+5%

44McCook County, SDSD5,96439.5+2%

45Roberts County, SDSD10,25538.5+4%

46Hanson County, SDSD3,45638.3+6%

47Brown County, SDSD37,56137.8+2%

48Beadle County, SDSD19,62437.6−6%

49Mellette County, SDSD2,13737.5+17%

50Meade County, SDSD30,71137.3+12%

51Ziebach County, SDSD2,38936.7+54%

52Lyman County, SDSD3,69436.1+5%

53Charles Mix County, SDSD9,30336.0+1%

54Minnehaha County, SDSD212,69136.0+7%

55Lincoln County, SDSD77,14535.9+6%

56Jackson County, SDSD2,66634.3+12%

57Jones County, SDSD91333.9−18%

58Hamlin County, SDSD6,90031.8−16%

59Corson County, SDSD3,78129.9+6%

60Oglala Lakota County, SDSD13,33828.2–

61Brookings County, SDSD37,63528.0+5%

62Dewey County, SDSD5,41927.7+5%

63Bennett County, SDSD3,30727.4−6%

64Todd County, SDSD8,86325.5+18%

65Clay County, SDSD15,03124.9+0%

66Buffalo County, SDSD1,80222.8−3%

SHOWING 1–66 OF 66

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES