RANKING · 1990 CENSUS · 65 SHOWN OF 65

Least educated, South Dakota counties · 1990

South Dakota counties with the smallest share of adults 25+ holding a bachelor's degree or higher (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

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPBACHELOR'S DEGREE OR HIGHERVS –

01Buffalo County, SDSD1,8024.2%–

02Ziebach County, SDSD2,3898.5%–

03Grant County, SDSD7,5349.3%–

04Tripp County, SDSD5,7089.6%–

05Deuel County, SDSD4,4089.7%–

06Clark County, SDSD4,0319.8%–

07Charles Mix County, SDSD9,3039.9%–

08McPherson County, SDSD2,34710.0%–

09Marshall County, SDSD4,42610.2%–

10Miner County, SDSD2,28110.3%–

11Roberts County, SDSD10,25510.4%–

12Bennett County, SDSD3,30710.4%–

13Dewey County, SDSD5,41910.4%–

14Corson County, SDSD3,78110.5%–

15Lyman County, SDSD3,69410.5%–

16Faulk County, SDSD2,17810.6%–

17Campbell County, SDSD1,37710.7%–

18Jackson County, SDSD2,66610.9%–

19Aurora County, SDSD2,80111.0%–

20Douglas County, SDSD2,88811.2%–

21Hamlin County, SDSD6,90011.2%–

22Bon Homme County, SDSD7,24411.3%–

23Edmunds County, SDSD4,02211.3%–

24Jerauld County, SDSD1,65411.3%–

25Day County, SDSD5,48411.3%–

26Hutchinson County, SDSD7,41311.3%–

27Kingsbury County, SDSD5,28411.6%–

28Gregory County, SDSD4,03711.8%–

29Todd County, SDSD8,86311.8%–

30McCook County, SDSD5,96411.9%–

31Potter County, SDSD2,37712.3%–

32Butte County, SDSD10,85612.3%–

33Mellette County, SDSD2,13712.3%–

34Turner County, SDSD9,31412.5%–

35Perkins County, SDSD2,85312.7%–

36Haakon County, SDSD1,80212.7%–

37Spink County, SDSD6,15512.7%–

38Hand County, SDSD3,12112.8%–

39Sully County, SDSD1,47912.9%–

40Codington County, SDSD29,56212.9%–

41Union County, SDSD17,40213.9%–

42Moody County, SDSD6,63213.9%–

43Jones County, SDSD91314.4%–

44Walworth County, SDSD5,21714.5%–

45Hyde County, SDSD1,19114.5%–

46Stanley County, SDSD3,01814.6%–

47Davison County, SDSD20,06914.8%–

48Brule County, SDSD5,27814.9%–

49Beadle County, SDSD19,62415.1%–

50Hanson County, SDSD3,45615.3%–

51Harding County, SDSD1,33116.2%–

52Fall River County, SDSD7,46716.3%–

53Lincoln County, SDSD77,14516.4%–

54Sanborn County, SDSD2,38816.4%–

55Meade County, SDSD30,71116.4%–

56Custer County, SDSD9,43117.5%–

57Lake County, SDSD10,99318.5%–

58Yankton County, SDSD23,63518.6%–

59Lawrence County, SDSD29,45919.2%–

60Brown County, SDSD37,56120.7%–

61Pennington County, SDSD116,79221.2%–

62Minnehaha County, SDSD212,69121.3%–

63Hughes County, SDSD17,57025.6%–

64Brookings County, SDSD37,63527.3%–

65Clay County, SDSD15,03136.3%–

SHOWING 1–65 OF 65

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