RANKING · 2020 CENSUS · 66 SHOWN OF 66

Youngest by median age, South Dakota counties · 2020

South Dakota counties with the youngest median age (2023 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

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Clay County, SDSD15,03125.1+1%

02Todd County, SDSD8,86325.1+16%

03Oglala Lakota County, SDSD13,33825.7–

04Buffalo County, SDSD1,80225.8+10%

05Ziebach County, SDSD2,38928.9+21%

06Brookings County, SDSD37,63529.7+12%

07Corson County, SDSD3,78130.5+8%

08Bennett County, SDSD3,30732.3+11%

09Dewey County, SDSD5,41932.4+22%

10Jackson County, SDSD2,66633.5+9%

11Mellette County, SDSD2,13734.8+8%

12Lincoln County, SDSD77,14535.0+3%

13Hamlin County, SDSD6,90035.1−8%

14Lyman County, SDSD3,69435.7+3%

15Minnehaha County, SDSD212,69135.9+7%

16Beadle County, SDSD19,62436.2−10%

17Meade County, SDSD30,71136.7+10%

18Charles Mix County, SDSD9,30336.9+3%

19Brown County, SDSD37,56138.2+3%

20Pennington County, SDSD116,79238.9+11%

21Codington County, SDSD29,56239.1+11%

22Roberts County, SDSD10,25539.2+6%

23Hanson County, SDSD3,45639.3+9%

24Hughes County, SDSD17,57039.3+5%

25Davison County, SDSD20,06939.5+10%

26Clark County, SDSD4,03139.8−4%

27Lake County, SDSD10,99340.0+10%

28Sanborn County, SDSD2,38840.5−1%

29Moody County, SDSD6,63241.0+11%

30Union County, SDSD17,40241.0+11%

31Harding County, SDSD1,33141.2+10%

32Butte County, SDSD10,85641.3+9%

33McCook County, SDSD5,96441.6+8%

34Turner County, SDSD9,31442.0+4%

35Aurora County, SDSD2,80142.2+4%

36Yankton County, SDSD23,63542.3+14%

37Hutchinson County, SDSD7,41342.4−2%

38Marshall County, SDSD4,42642.6+2%

39Stanley County, SDSD3,01842.6+13%

40Spink County, SDSD6,15542.9+8%

41Tripp County, SDSD5,70843.0+9%

42Bon Homme County, SDSD7,24443.1+7%

43Brule County, SDSD5,27843.3+17%

44Haakon County, SDSD1,80243.3+5%

45Lawrence County, SDSD29,45943.5+17%

46Walworth County, SDSD5,21743.7+2%

47Deuel County, SDSD4,40843.9+8%

48Edmunds County, SDSD4,02244.7+7%

49Grant County, SDSD7,53444.8+11%

50Kingsbury County, SDSD5,28444.8+5%

51Jones County, SDSD91345.2+10%

52Miner County, SDSD2,28145.3+7%

53Sully County, SDSD1,47945.4+13%

54Hyde County, SDSD1,19145.5+8%

55Faulk County, SDSD2,17846.4+12%

56Douglas County, SDSD2,88846.6+11%

57Hand County, SDSD3,12146.9+8%

58Day County, SDSD5,48447.2+10%

59Perkins County, SDSD2,85347.2+10%

60Gregory County, SDSD4,03748.0+8%

61Jerauld County, SDSD1,65450.5+9%

62McPherson County, SDSD2,34751.6+8%

63Potter County, SDSD2,37752.2+14%

64Campbell County, SDSD1,37753.5+28%

65Fall River County, SDSD7,46755.1+21%

66Custer County, SDSD9,43156.4+31%

SHOWING 1–66 OF 66

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