RANKING · 2020 CENSUS · 99 SHOWN OF 99

Most graduate degrees, Iowa counties · 2020

Iowa counties ranked by the share of adults 25+ holding a graduate or professional degree (2020 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

RELATEDMost college graduates Most educated Least educated Fewest graduate degrees

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPGRADUATE DEGREEVS 2000

01Johnson County, IAIA160,04425.2%+18%

02Story County, IAIA101,29122.0%+12%

03Dallas County, IAIA118,45716.1%+150%

04Jefferson County, IAIA15,29115.4%+30%

05Poweshiek County, IAIA18,36813.3%+95%

06Scott County, IAIA175,25912.1%+48%

07Decatur County, IAIA7,65512.0%+123%

08Polk County, IAIA516,54611.6%+33%

09Winneshiek County, IAIA19,73311.3%+82%

10Dubuque County, IAIA99,38111.3%+67%

11Linn County, IAIA232,02810.5%+46%

12Bremer County, IAIA25,29610.5%+66%

13Marion County, IAIA34,1929.9%+82%

14Black Hawk County, IAIA131,5329.8%+14%

15Warren County, IAIA57,3319.4%+56%

16Sioux County, IAIA36,7748.5%+33%

17Dickinson County, IAIA18,0778.4%+54%

18Madison County, IAIA17,2707.8%+130%

19Cherokee County, IAIA11,3697.6%+87%

20Woodbury County, IAIA106,6497.6%+26%

21Cerro Gordo County, IAIA42,3727.5%+23%

22Boone County, IAIA26,7997.4%+52%

23Wapello County, IAIA35,2107.3%+49%

24Clay County, IAIA16,2027.0%+145%

25Union County, IAIA11,8297.0%+95%

26Muscatine County, IAIA41,8536.9%+44%

27Pottawattamie County, IAIA92,9966.9%+52%

28Mills County, IAIA14,7936.9%+58%

29Palo Alto County, IAIA8,8996.9%+80%

30Cass County, IAIA12,9606.8%+48%

31Calhoun County, IAIA9,5626.7%+63%

32Des Moines County, IAIA38,0776.6%+26%

33Hardin County, IAIA16,4556.5%+45%

34Guthrie County, IAIA10,7826.4%+84%

35Grundy County, IAIA12,3616.4%+43%

36Buchanan County, IAIA20,8836.4%+105%

37Buena Vista County, IAIA20,4496.4%+37%

38Ringgold County, IAIA4,6426.3%+38%

39Marshall County, IAIA39,8906.3%+41%

40Henry County, IAIA19,3496.3%+31%

41Benton County, IAIA26,0046.2%+71%

42Washington County, IAIA22,6676.2%+29%

43Mahaska County, IAIA21,8806.2%+42%

44Webster County, IAIA36,8386.1%+20%

45Jackson County, IAIA19,2886.1%+53%

46Harrison County, IAIA14,6236.0%+93%

47Iowa County, IAIA16,5045.9%+39%

48Jones County, IAIA21,2535.9%+79%

49Hamilton County, IAIA14,9445.8%+28%

50Mitchell County, IAIA10,6505.7%+99%

51Jasper County, IAIA38,1535.6%+28%

52Worth County, IAIA7,3385.6%+87%

53Van Buren County, IAIA7,1315.5%+54%

54Page County, IAIA14,8565.5%+14%

55Shelby County, IAIA11,6895.5%+34%

56Cedar County, IAIA18,3595.4%+51%

57Plymouth County, IAIA25,6975.4%+21%

58Clinton County, IAIA46,0025.4%+37%

59Fayette County, IAIA19,0475.4%+44%

60Chickasaw County, IAIA11,6635.3%+67%

61Delaware County, IAIA17,6745.3%+69%

62Carroll County, IAIA20,3035.3%+53%

63Greene County, IAIA8,6585.2%+52%

64Floyd County, IAIA14,9015.1%+34%

65Audubon County, IAIA5,5095.0%+23%

66O'Brien County, IAIA14,2204.9%+48%

67Allamakee County, IAIA14,2384.9%+30%

68Keokuk County, IAIA9,7974.9%+75%

69Lee County, IAIA32,3064.9%+46%

70Adair County, IAIA7,4034.8%+111%

71Sac County, IAIA9,5254.8%+43%

72Monona County, IAIA8,5394.7%+55%

73Winnebago County, IAIA10,2514.7%+10%

74Emmet County, IAIA9,1074.7%+35%

75Montgomery County, IAIA10,0024.7%+42%

76Lyon County, IAIA12,3544.6%+39%

77Davis County, IAIA9,2304.5%+36%

78Howard County, IAIA9,4154.5%+33%

79Wayne County, IAIA6,7384.4%+24%

80Kossuth County, IAIA14,3224.3%+30%

81Clayton County, IAIA16,8454.3%+25%

82Clarke County, IAIA9,5744.3%+35%

83Fremont County, IAIA6,5224.2%+40%

84Appanoose County, IAIA12,0774.2%+37%

85Tama County, IAIA16,7964.2%+47%

86Crawford County, IAIA16,2374.2%+31%

87Hancock County, IAIA10,5284.2%+11%

88Butler County, IAIA14,0494.2%+25%

89Lucas County, IAIA8,8474.1%+42%

90Louisa County, IAIA10,4164.1%+19%

91Humboldt County, IAIA9,4093.9%+2%

92Adams County, IAIA3,6173.8%+32%

93Ida County, IAIA6,7773.8%+31%

94Wright County, IAIA12,8013.8%−1%

95Monroe County, IAIA7,4063.7%+18%

96Osceola County, IAIA5,9803.6%−20%

97Taylor County, IAIA5,8353.5%−4%

98Franklin County, IAIA9,8683.3%+1%

99Pocahontas County, IAIA6,8193.0%+4%

SHOWING 1–99 OF 99

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