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. The median across all 66 is 41.5. Biggest climber in the top 100 since 2020: Harding County, SD, up 25 places to #11.

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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%

03▲10Hyde County, SDSD1,19153.7+27%

04▼1Campbell County, SDSD1,37750.9+21%

05McPherson County, SDSD2,34750.0+5%

06▼2Potter County, SDSD2,37749.9+9%

07▲8Miner County, SDSD2,28148.4+14%

08▲16Haakon County, SDSD1,80247.9+16%

09▼3Jerauld County, SDSD1,65446.9+1%

10▲4Sully County, SDSD1,47946.9+17%

11▲25Harding County, SDSD1,33146.3+23%

12▲15Spink County, SDSD6,15545.5+14%

13▲13Tripp County, SDSD5,70845.0+14%

14▼6Day County, SDSD5,48444.8+4%

15▲7Lawrence County, SDSD29,45944.8+20%

16▼9Gregory County, SDSD4,03744.7+1%

17Grant County, SDSD7,53444.5+10%

18▲11Stanley County, SDSD3,01844.5+18%

19Edmunds County, SDSD4,02244.0+6%

20▼11Perkins County, SDSD2,85344.0+2%

21▲19Lake County, SDSD10,99343.8+20%

22▼10Faulk County, SDSD2,17842.9+3%

23▼13Hand County, SDSD3,12142.5−3%

24▲4Marshall County, SDSD4,42642.5+2%

25▲6Yankton County, SDSD23,63542.5+15%

26▼1Bon Homme County, SDSD7,24442.1+4%

27▲3Hutchinson County, SDSD7,41342.1−2%

28▼10Kingsbury County, SDSD5,28442.1−1%

29▼18Douglas County, SDSD2,88842.00%

30▼10Deuel County, SDSD4,40841.8+2%

31▲1Aurora County, SDSD2,80141.7+3%

32▼11Walworth County, SDSD5,21741.7−3%

33▼10Brule County, SDSD5,27841.5+12%

34▲4Union County, SDSD17,40241.5+12%

35▼2Turner County, SDSD9,31441.2+2%

36▲1Moody County, SDSD6,63240.8+10%

37▲9Codington County, SDSD29,56240.4+14%

38▲3Clark County, SDSD4,03140.3−3%

39▼4Butte County, SDSD10,85640.2+6%

40▲7Pennington County, SDSD116,79240.1+15%

41▼2Sanborn County, SDSD2,38840.1−2%

42Davison County, SDSD20,06939.6+10%

43▲1Hughes County, SDSD17,57039.5+5%

44▼10McCook County, SDSD5,96439.5+2%

45Roberts County, SDSD10,25538.5+4%

46▼3Hanson County, SDSD3,45638.3+6%

47▲1Brown County, SDSD37,56137.8+2%

48▲3Beadle County, SDSD19,62437.6−6%

49▲7Mellette County, SDSD2,13737.5+17%

50Meade County, SDSD30,71137.3+12%

51▲11Ziebach County, SDSD2,38936.7+54%

52▲1Lyman County, SDSD3,69436.1+5%

53▼4Charles Mix County, SDSD9,30336.0+1%

54▼2Minnehaha County, SDSD212,69136.0+7%

55Lincoln County, SDSD77,14535.9+6%

56▲1Jackson County, SDSD2,66634.3+12%

57▼41Jones County, SDSD91333.9−18%

58▼4Hamlin County, SDSD6,90031.8−16%

59▲1Corson County, SDSD3,78129.9+6%

60▲4Oglala Lakota County, SDSD13,33828.2–

61Brookings County, SDSD37,63528.0+5%

62▼4Dewey County, SDSD5,41927.7+5%

63▼4Bennett County, SDSD3,30727.4−6%

64▲2Todd County, SDSD8,86325.5+18%

65Clay County, SDSD15,03124.90%

66▼3Buffalo County, SDSD1,80222.8−3%

SHOWING 1–66 OF 66

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES