RANKING · 1990 CENSUS · 65 SHOWN OF 65

Oldest by median age, South Dakota counties · 1990

South Dakota counties ranked by median age of residents (1990 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

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 –

01McPherson County, SDSD2,34746.6–

02Fall River County, SDSD7,46741.6–

03Hutchinson County, SDSD7,41341.5–

04Jerauld County, SDSD1,65441.2–

05Edmunds County, SDSD4,02240.3–

06Walworth County, SDSD5,21739.9–

07Kingsbury County, SDSD5,28439.8–

08Day County, SDSD5,48439.3–

09Turner County, SDSD9,31439.3–

10Campbell County, SDSD1,37739.3–

11Perkins County, SDSD2,85339.2–

12Potter County, SDSD2,37739.1–

13Faulk County, SDSD2,17839.1–

14Miner County, SDSD2,28139.1–

15Clark County, SDSD4,03139.0–

16Marshall County, SDSD4,42638.9–

17Hyde County, SDSD1,19138.8–

18Deuel County, SDSD4,40838.6–

19Hand County, SDSD3,12138.5–

20Aurora County, SDSD2,80138.4–

21McCook County, SDSD5,96438.3–

22Gregory County, SDSD4,03738.2–

23Hamlin County, SDSD6,90037.7–

24Bon Homme County, SDSD7,24437.4–

25Douglas County, SDSD2,88837.1–

26Custer County, SDSD9,43137.0–

27Hanson County, SDSD3,45636.9–

28Jones County, SDSD91336.5–

29Spink County, SDSD6,15536.0–

30Sanborn County, SDSD2,38835.9–

31Sully County, SDSD1,47935.5–

32Beadle County, SDSD19,62435.5–

33Roberts County, SDSD10,25535.3–

34Union County, SDSD17,40235.0–

35Grant County, SDSD7,53434.9–

36Butte County, SDSD10,85634.6–

37Tripp County, SDSD5,70834.5–

38Moody County, SDSD6,63234.2–

39Lake County, SDSD10,99333.9–

40Charles Mix County, SDSD9,30333.8–

41Davison County, SDSD20,06933.6–

42Yankton County, SDSD23,63533.5–

43Lincoln County, SDSD77,14533.2–

44Hughes County, SDSD17,57033.2–

45Brown County, SDSD37,56133.1–

46Codington County, SDSD29,56232.9–

47Brule County, SDSD5,27832.8–

48Stanley County, SDSD3,01832.8–

49Lawrence County, SDSD29,45932.5–

50Harding County, SDSD1,33132.4–

51Haakon County, SDSD1,80231.7–

52Minnehaha County, SDSD212,69131.5–

53Lyman County, SDSD3,69431.3–

54Mellette County, SDSD2,13730.4–

55Pennington County, SDSD116,79230.2–

56Meade County, SDSD30,71130.1–

57Jackson County, SDSD2,66629.8–

58Bennett County, SDSD3,30729.7–

59Corson County, SDSD3,78128.7–

60Brookings County, SDSD37,63526.3–

61Dewey County, SDSD5,41926.0–

62Ziebach County, SDSD2,38924.8–

63Clay County, SDSD15,03124.0–

64Buffalo County, SDSD1,80222.2–

65Todd County, SDSD8,86320.6–

SHOWING 1–65 OF 65

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS