RANKING · 1990 CENSUS · 99 SHOWN OF 99

Fewest graduate degrees, Iowa counties · 1990

Iowa counties with the smallest share of adults 25+ holding a graduate or professional degree (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

RANKPLACESTATEPOPGRADUATE DEGREEVS 2000

01Ida County, IAIA6,7771.7%−41%

02Lucas County, IAIA8,8471.9%−33%

03Howard County, IAIA9,4152.1%−38%

04Adair County, IAIA7,4032.1%−7%

05Clarke County, IAIA9,5742.2%−30%

06Lyon County, IAIA12,3542.3%−30%

07Monona County, IAIA8,5392.4%−23%

08Benton County, IAIA26,0042.4%−35%

09Mitchell County, IAIA10,6502.4%−16%

10Louisa County, IAIA10,4162.4%−30%

11Keokuk County, IAIA9,7972.4%−14%

12Clay County, IAIA16,2022.4%−15%

13Emmet County, IAIA9,1072.4%−30%

14Harrison County, IAIA14,6232.5%−22%

15Clayton County, IAIA16,8452.5%−27%

16Butler County, IAIA14,0492.5%−25%

17Worth County, IAIA7,3382.5%−16%

18Van Buren County, IAIA7,1312.5%−30%

19Chickasaw County, IAIA11,6632.6%−20%

20Winnebago County, IAIA10,2512.6%−39%

21Cherokee County, IAIA11,3692.6%−35%

22Fremont County, IAIA6,5222.6%−13%

23Crawford County, IAIA16,2372.6%−17%

24Audubon County, IAIA5,5092.7%−34%

25Wayne County, IAIA6,7382.7%−23%

26Taylor County, IAIA5,8352.8%−25%

27Hancock County, IAIA10,5282.8%−27%

28Palo Alto County, IAIA8,8992.8%−28%

29Wright County, IAIA12,8012.8%−27%

30Sac County, IAIA9,5252.8%−16%

31Jones County, IAIA21,2532.8%−14%

32Montgomery County, IAIA10,0022.8%−15%

33Davis County, IAIA9,2302.8%−15%

34Delaware County, IAIA17,6742.9%−9%

35Tama County, IAIA16,7962.9%+0%

36Kossuth County, IAIA14,3222.9%−13%

37Hamilton County, IAIA14,9442.9%−36%

38Buchanan County, IAIA20,8832.9%−7%

39Guthrie County, IAIA10,7822.9%−16%

40Grundy County, IAIA12,3612.9%−35%

41Mills County, IAIA14,7933.0%−32%

42Washington County, IAIA22,6673.0%−39%

43Carroll County, IAIA20,3033.0%−14%

44Appanoose County, IAIA12,0773.0%−3%

45Jackson County, IAIA19,2883.0%−24%

46Monroe County, IAIA7,4063.0%−5%

47Allamakee County, IAIA14,2383.0%−20%

48Humboldt County, IAIA9,4093.1%−19%

49Calhoun County, IAIA9,5623.1%−24%

50Shelby County, IAIA11,6893.1%−24%

51Iowa County, IAIA16,5043.1%−27%

52Pocahontas County, IAIA6,8193.1%+8%

53Jasper County, IAIA38,1533.1%−29%

54Hardin County, IAIA16,4553.3%−26%

55Pottawattamie County, IAIA92,9963.3%−28%

56Franklin County, IAIA9,8683.3%+1%

57Adams County, IAIA3,6173.3%+15%

58Cedar County, IAIA18,3593.4%−6%

59Lee County, IAIA32,3063.4%+2%

60Boone County, IAIA26,7993.4%−30%

61Greene County, IAIA8,6583.4%+2%

62Marion County, IAIA34,1923.5%−36%

63Fayette County, IAIA19,0473.5%−7%

64Clinton County, IAIA46,0023.5%−12%

65Muscatine County, IAIA41,8533.5%−27%

66Cass County, IAIA12,9603.5%−23%

67Madison County, IAIA17,2703.5%+4%

68Wapello County, IAIA35,2103.6%−28%

69Buena Vista County, IAIA20,4493.6%−23%

70Ringgold County, IAIA4,6423.6%−21%

71O'Brien County, IAIA14,2203.7%+10%

72Floyd County, IAIA14,9013.7%−3%

73Osceola County, IAIA5,9803.8%−17%

74Union County, IAIA11,8293.8%+7%

75Webster County, IAIA36,8383.8%−25%

76Henry County, IAIA19,3493.8%−19%

77Des Moines County, IAIA38,0773.9%−25%

78Mahaska County, IAIA21,8803.9%−10%

79Page County, IAIA14,8563.9%−18%

80Dallas County, IAIA118,4574.1%−37%

81Plymouth County, IAIA25,6974.2%−6%

82Bremer County, IAIA25,2964.4%−31%

83Warren County, IAIA57,3314.4%−27%

84Marshall County, IAIA39,8904.6%+2%

85Cerro Gordo County, IAIA42,3724.6%−25%

86Woodbury County, IAIA106,6494.8%−19%

87Dickinson County, IAIA18,0774.9%−9%

88Sioux County, IAIA36,7745.0%−22%

89Decatur County, IAIA7,6555.0%−7%

90Winneshiek County, IAIA19,7335.0%−18%

91Dubuque County, IAIA99,3815.1%−24%

92Black Hawk County, IAIA131,5325.7%−35%

93Linn County, IAIA232,0285.7%−21%

94Poweshiek County, IAIA18,3686.3%−7%

95Scott County, IAIA175,2596.4%−22%

96Polk County, IAIA516,5467.3%−17%

97Jefferson County, IAIA15,29111.2%−6%

98Story County, IAIA101,29117.3%−12%

99Johnson County, IAIA160,04420.0%−7%

SHOWING 1–99 OF 99

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