RANKING · 1990 CENSUS · 65 SHOWN OF 65

Youngest by median age, South Dakota counties · 1990

South Dakota counties with the youngest median age (2023 ACS). This list covers the 65 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

01Todd County, SDSD8,86320.6−5%

02Buffalo County, SDSD1,80222.2−5%

03Clay County, SDSD15,03124.0−4%

04Ziebach County, SDSD2,38924.8+4%

05Dewey County, SDSD5,41926.0−2%

06Brookings County, SDSD37,63526.3−1%

07Corson County, SDSD3,78128.7+1%

08Bennett County, SDSD3,30729.7+2%

09Jackson County, SDSD2,66629.8−3%

10Meade County, SDSD30,71130.1−10%

11Pennington County, SDSD116,79230.2−14%

12Mellette County, SDSD2,13730.4−5%

13Lyman County, SDSD3,69431.3−9%

14Minnehaha County, SDSD212,69131.5−6%

15Haakon County, SDSD1,80231.7−23%

16Harding County, SDSD1,33132.4−14%

17Lawrence County, SDSD29,45932.5−13%

18Stanley County, SDSD3,01832.8−13%

19Brule County, SDSD5,27832.8−11%

20Codington County, SDSD29,56232.9−7%

21Brown County, SDSD37,56133.1−11%

22Hughes County, SDSD17,57033.2−11%

23Lincoln County, SDSD77,14533.2−2%

24Yankton County, SDSD23,63533.5−9%

25Davison County, SDSD20,06933.6−7%

26Charles Mix County, SDSD9,30333.8−5%

27Lake County, SDSD10,99333.9−7%

28Moody County, SDSD6,63234.2−8%

29Tripp County, SDSD5,70834.5−13%

30Butte County, SDSD10,85634.6−9%

31Grant County, SDSD7,53434.9−13%

32Union County, SDSD17,40235.0−5%

33Roberts County, SDSD10,25535.3−5%

34Beadle County, SDSD19,62435.5−11%

35Sully County, SDSD1,47935.5−11%

36Sanborn County, SDSD2,38835.9−12%

37Spink County, SDSD6,15536.0−10%

38Jones County, SDSD91336.5−11%

39Hanson County, SDSD3,45636.9+2%

40Custer County, SDSD9,43137.0−14%

41Douglas County, SDSD2,88837.1−11%

42Bon Homme County, SDSD7,24437.4−7%

43Hamlin County, SDSD6,90037.7−1%

44Gregory County, SDSD4,03738.2−14%

45McCook County, SDSD5,96438.3−1%

46Aurora County, SDSD2,80138.4−5%

47Hand County, SDSD3,12138.5−12%

48Deuel County, SDSD4,40838.6−5%

49Hyde County, SDSD1,19138.8−8%

50Marshall County, SDSD4,42638.9−6%

51Clark County, SDSD4,03139.0−6%

52Miner County, SDSD2,28139.1−8%

53Faulk County, SDSD2,17839.1−6%

54Potter County, SDSD2,37739.1−15%

55Perkins County, SDSD2,85339.2−9%

56Campbell County, SDSD1,37739.3−6%

57Turner County, SDSD9,31439.3−3%

58Day County, SDSD5,48439.3−8%

59Kingsbury County, SDSD5,28439.8−7%

60Walworth County, SDSD5,21739.9−7%

61Edmunds County, SDSD4,02240.3−3%

62Jerauld County, SDSD1,65441.2−11%

63Hutchinson County, SDSD7,41341.5−4%

64Fall River County, SDSD7,46741.6−9%

65McPherson County, SDSD2,34746.6−2%

SHOWING 1–65 OF 65

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