RANKING · 1990 CENSUS · 99 SHOWN OF 99

Least educated, Iowa counties · 1990

Iowa counties with the smallest share of adults 25+ holding a bachelor's degree or higher (2023 ACS). This list covers the 99 counties in Iowa 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 2000

01Monroe County, IAIA7,4068.0%−37%

02Howard County, IAIA9,4158.2%−35%

03Wayne County, IAIA6,7388.4%−31%

04Taylor County, IAIA5,8358.7%−28%

05Clarke County, IAIA9,5748.8%−27%

06Allamakee County, IAIA14,2388.9%−38%

07Clayton County, IAIA16,8459.0%−29%

08Harrison County, IAIA14,6239.1%−28%

09Louisa County, IAIA10,4169.2%−27%

10Adams County, IAIA3,6179.4%−22%

11Keokuk County, IAIA9,7979.4%−19%

12Butler County, IAIA14,0499.4%−24%

13Lucas County, IAIA8,8479.5%−15%

14Van Buren County, IAIA7,1319.6%−19%

15Benton County, IAIA26,0049.6%−31%

16Audubon County, IAIA5,5099.8%−21%

17Adair County, IAIA7,4039.8%−12%

18Crawford County, IAIA16,2379.8%−20%

19Guthrie County, IAIA10,7829.9%−34%

20Chickasaw County, IAIA11,6639.9%−19%

21Osceola County, IAIA5,98010.0%−26%

22Jackson County, IAIA19,28810.0%−17%

23Lyon County, IAIA12,35410.2%−28%

24Ringgold County, IAIA4,64210.3%−24%

25Hancock County, IAIA10,52810.3%−33%

26Monona County, IAIA8,53910.3%−23%

27Davis County, IAIA9,23010.5%−8%

28Jones County, IAIA21,25310.6%−16%

29Lee County, IAIA32,30610.7%−14%

30Cherokee County, IAIA11,36910.8%−29%

31Worth County, IAIA7,33810.9%−14%

32Wapello County, IAIA35,21011.0%−25%

33Emmet County, IAIA9,10711.0%−16%

34Ida County, IAIA6,77711.0%−19%

35Pottawattamie County, IAIA92,99611.0%−27%

36Delaware County, IAIA17,67411.0%−15%

37Mitchell County, IAIA10,65011.1%−14%

38Iowa County, IAIA16,50411.1%−29%

39Buchanan County, IAIA20,88311.2%−12%

40Tama County, IAIA16,79611.2%−13%

41Carroll County, IAIA20,30311.3%−29%

42Fremont County, IAIA6,52211.3%−19%

43Wright County, IAIA12,80111.3%−16%

44Appanoose County, IAIA12,07711.5%−6%

45Humboldt County, IAIA9,40911.6%−25%

46Calhoun County, IAIA9,56211.6%−25%

47Washington County, IAIA22,66711.7%−29%

48Kossuth County, IAIA14,32211.8%−13%

49Fayette County, IAIA19,04711.8%−14%

50Madison County, IAIA17,27012.0%−16%

51Floyd County, IAIA14,90112.2%−17%

52Decatur County, IAIA7,65512.3%−19%

53Grundy County, IAIA12,36112.3%−29%

54Franklin County, IAIA9,86812.3%−15%

55Hardin County, IAIA16,45512.4%−27%

56Cass County, IAIA12,96012.5%−25%

57O'Brien County, IAIA14,22012.6%−14%

58Mills County, IAIA14,79312.6%−22%

59Sac County, IAIA9,52512.7%−6%

60Des Moines County, IAIA38,07712.7%−20%

61Jasper County, IAIA38,15312.7%−20%

62Cedar County, IAIA18,35912.8%−22%

63Montgomery County, IAIA10,00212.8%−1%

64Union County, IAIA11,82912.8%−13%

65Hamilton County, IAIA14,94412.8%−27%

66Shelby County, IAIA11,68912.8%−17%

67Pocahontas County, IAIA6,81912.8%−15%

68Palo Alto County, IAIA8,89912.8%−8%

69Marion County, IAIA34,19212.9%−32%

70Clinton County, IAIA46,00212.9%−10%

71Muscatine County, IAIA41,85313.0%−24%

72Mahaska County, IAIA21,88013.1%−21%

73Page County, IAIA14,85613.5%−18%

74Greene County, IAIA8,65813.7%−7%

75Webster County, IAIA36,83813.7%−19%

76Boone County, IAIA26,79913.7%−27%

77Winnebago County, IAIA10,25114.0%−15%

78Sioux County, IAIA36,77414.4%−27%

79Clay County, IAIA16,20214.5%−11%

80Henry County, IAIA19,34914.5%−10%

81Plymouth County, IAIA25,69715.0%−22%

82Bremer County, IAIA25,29615.1%−30%

83Buena Vista County, IAIA20,44915.2%−19%

84Cerro Gordo County, IAIA42,37215.5%−24%

85Marshall County, IAIA39,89015.8%−7%

86Warren County, IAIA57,33116.2%−24%

87Poweshiek County, IAIA18,36816.2%−12%

88Dallas County, IAIA118,45716.3%−39%

89Woodbury County, IAIA106,64916.7%−12%

90Dubuque County, IAIA99,38116.8%−21%

91Winneshiek County, IAIA19,73317.1%−17%

92Black Hawk County, IAIA131,53217.3%−25%

93Dickinson County, IAIA18,07717.5%−18%

94Linn County, IAIA232,02821.5%−22%

95Scott County, IAIA175,25921.9%−12%

96Polk County, IAIA516,54623.9%−20%

97Jefferson County, IAIA15,29126.5%−15%

98Story County, IAIA101,29138.4%−14%

99Johnson County, IAIA160,04444.0%−8%

SHOWING 1–99 OF 99

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