RANKING · 2024 ACS · 66 SHOWN OF 66

Youngest by median age, South Dakota counties

South Dakota counties with the youngest median age (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: Jones County, SD, up 41 places to #10.

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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

01▲3Buffalo County, SDSD1,80222.8−3%

02▼1Clay County, SDSD15,03124.90%

03▼1Todd County, SDSD8,86325.5+18%

04▲4Bennett County, SDSD3,30727.4−6%

05▲4Dewey County, SDSD5,41927.7+5%

06Brookings County, SDSD37,63528.0+5%

07▼4Oglala Lakota County, SDSD13,33828.2–

08▼1Corson County, SDSD3,78129.9+6%

09▲4Hamlin County, SDSD6,90031.8−16%

10▲41Jones County, SDSD91333.9−18%

11▼1Jackson County, SDSD2,66634.3+12%

12Lincoln County, SDSD77,14535.9+6%

13▲5Charles Mix County, SDSD9,30336.0+1%

14▲1Minnehaha County, SDSD212,69136.0+7%

15▼1Lyman County, SDSD3,69436.1+5%

16▼11Ziebach County, SDSD2,38936.7+54%

17Meade County, SDSD30,71137.3+12%

18▼7Mellette County, SDSD2,13737.5+17%

19▼3Beadle County, SDSD19,62437.6−6%

20▼1Brown County, SDSD37,56137.8+2%

21▲2Hanson County, SDSD3,45638.3+6%

22Roberts County, SDSD10,25538.5+4%

23▲1Hughes County, SDSD17,57039.5+5%

24▲9McCook County, SDSD5,96439.5+2%

25Davison County, SDSD20,06939.6+10%

26▼6Pennington County, SDSD116,79240.1+15%

27▲1Sanborn County, SDSD2,38840.1−2%

28▲4Butte County, SDSD10,85640.2+6%

29▼3Clark County, SDSD4,03140.3−3%

30▼9Codington County, SDSD29,56240.4+14%

31▼2Moody County, SDSD6,63240.8+10%

32▲2Turner County, SDSD9,31441.2+2%

33▲10Brule County, SDSD5,27841.5+12%

34▼4Union County, SDSD17,40241.5+12%

35Aurora County, SDSD2,80141.7+3%

36▲10Walworth County, SDSD5,21741.7−3%

37▲10Deuel County, SDSD4,40841.8+2%

38▲18Douglas County, SDSD2,88842.00%

39▲3Bon Homme County, SDSD7,24442.1+4%

40▼3Hutchinson County, SDSD7,41342.1−2%

41▲9Kingsbury County, SDSD5,28442.1−1%

42▲15Hand County, SDSD3,12142.5−3%

43▼5Marshall County, SDSD4,42642.5+2%

44▼8Yankton County, SDSD23,63542.5+15%

45▲10Faulk County, SDSD2,17842.9+3%

46▼19Lake County, SDSD10,99343.8+20%

47▲1Edmunds County, SDSD4,02244.0+6%

48▲11Perkins County, SDSD2,85344.0+2%

49Grant County, SDSD7,53444.5+10%

50▼11Stanley County, SDSD3,01844.5+18%

51▲9Gregory County, SDSD4,03744.7+1%

52▲6Day County, SDSD5,48444.8+4%

53▼8Lawrence County, SDSD29,45944.8+20%

54▼13Tripp County, SDSD5,70845.0+14%

55▼15Spink County, SDSD6,15545.5+14%

56▼25Harding County, SDSD1,33146.3+23%

57▲4Jerauld County, SDSD1,65446.9+1%

58▼5Sully County, SDSD1,47946.9+17%

59▼15Haakon County, SDSD1,80247.9+16%

60▼8Miner County, SDSD2,28148.4+14%

61▲2Potter County, SDSD2,37749.9+9%

62McPherson County, SDSD2,34750.0+5%

63▲1Campbell County, SDSD1,37750.9+21%

64▼10Hyde County, SDSD1,19153.7+27%

65Fall River County, SDSD7,46755.3+22%

66Custer County, SDSD9,43157.6+33%

SHOWING 1–66 OF 66

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