RANKING · 1990 CENSUS · 99 SHOWN OF 99

Most graduate degrees, Iowa counties · 1990

Iowa counties ranked by the 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

01Johnson County, IAIA160,04420.0%−7%

02Story County, IAIA101,29117.3%−12%

03Jefferson County, IAIA15,29111.2%−6%

04Polk County, IAIA516,5467.3%−17%

05Scott County, IAIA175,2596.4%−22%

06Poweshiek County, IAIA18,3686.3%−7%

07Linn County, IAIA232,0285.7%−21%

08Black Hawk County, IAIA131,5325.7%−35%

09Dubuque County, IAIA99,3815.1%−24%

10Winneshiek County, IAIA19,7335.0%−18%

11Decatur County, IAIA7,6555.0%−7%

12Sioux County, IAIA36,7745.0%−22%

13Dickinson County, IAIA18,0774.9%−9%

14Woodbury County, IAIA106,6494.8%−19%

15Cerro Gordo County, IAIA42,3724.6%−25%

16Marshall County, IAIA39,8904.6%+2%

17Warren County, IAIA57,3314.4%−27%

18Bremer County, IAIA25,2964.4%−31%

19Plymouth County, IAIA25,6974.2%−6%

20Dallas County, IAIA118,4574.1%−37%

21Page County, IAIA14,8563.9%−18%

22Mahaska County, IAIA21,8803.9%−10%

23Des Moines County, IAIA38,0773.9%−25%

24Henry County, IAIA19,3493.8%−19%

25Webster County, IAIA36,8383.8%−25%

26Union County, IAIA11,8293.8%+7%

27Osceola County, IAIA5,9803.8%−17%

28Floyd County, IAIA14,9013.7%−3%

29O'Brien County, IAIA14,2203.7%+10%

30Ringgold County, IAIA4,6423.6%−21%

31Buena Vista County, IAIA20,4493.6%−23%

32Wapello County, IAIA35,2103.6%−28%

33Madison County, IAIA17,2703.5%+4%

34Cass County, IAIA12,9603.5%−23%

35Muscatine County, IAIA41,8533.5%−27%

36Clinton County, IAIA46,0023.5%−12%

37Fayette County, IAIA19,0473.5%−7%

38Marion County, IAIA34,1923.5%−36%

39Greene County, IAIA8,6583.4%+2%

40Boone County, IAIA26,7993.4%−30%

41Lee County, IAIA32,3063.4%+2%

42Cedar County, IAIA18,3593.4%−6%

43Adams County, IAIA3,6173.3%+15%

44Franklin County, IAIA9,8683.3%+1%

45Pottawattamie County, IAIA92,9963.3%−28%

46Hardin County, IAIA16,4553.3%−26%

47Jasper County, IAIA38,1533.1%−29%

48Pocahontas County, IAIA6,8193.1%+8%

49Iowa County, IAIA16,5043.1%−27%

50Shelby County, IAIA11,6893.1%−24%

51Calhoun County, IAIA9,5623.1%−24%

52Humboldt County, IAIA9,4093.1%−19%

53Allamakee County, IAIA14,2383.0%−20%

54Monroe County, IAIA7,4063.0%−5%

55Jackson County, IAIA19,2883.0%−24%

56Appanoose County, IAIA12,0773.0%−3%

57Carroll County, IAIA20,3033.0%−14%

58Washington County, IAIA22,6673.0%−39%

59Mills County, IAIA14,7933.0%−32%

60Grundy County, IAIA12,3612.9%−35%

61Guthrie County, IAIA10,7822.9%−16%

62Buchanan County, IAIA20,8832.9%−7%

63Hamilton County, IAIA14,9442.9%−36%

64Kossuth County, IAIA14,3222.9%−13%

65Tama County, IAIA16,7962.9%+0%

66Delaware County, IAIA17,6742.9%−9%

67Davis County, IAIA9,2302.8%−15%

68Montgomery County, IAIA10,0022.8%−15%

69Jones County, IAIA21,2532.8%−14%

70Sac County, IAIA9,5252.8%−16%

71Wright County, IAIA12,8012.8%−27%

72Palo Alto County, IAIA8,8992.8%−28%

73Hancock County, IAIA10,5282.8%−27%

74Taylor County, IAIA5,8352.8%−25%

75Wayne County, IAIA6,7382.7%−23%

76Audubon County, IAIA5,5092.7%−34%

77Crawford County, IAIA16,2372.6%−17%

78Fremont County, IAIA6,5222.6%−13%

79Cherokee County, IAIA11,3692.6%−35%

80Winnebago County, IAIA10,2512.6%−39%

81Chickasaw County, IAIA11,6632.6%−20%

82Van Buren County, IAIA7,1312.5%−30%

83Worth County, IAIA7,3382.5%−16%

84Butler County, IAIA14,0492.5%−25%

85Clayton County, IAIA16,8452.5%−27%

86Harrison County, IAIA14,6232.5%−22%

87Emmet County, IAIA9,1072.4%−30%

88Clay County, IAIA16,2022.4%−15%

89Keokuk County, IAIA9,7972.4%−14%

90Louisa County, IAIA10,4162.4%−30%

91Mitchell County, IAIA10,6502.4%−16%

92Benton County, IAIA26,0042.4%−35%

93Monona County, IAIA8,5392.4%−23%

94Lyon County, IAIA12,3542.3%−30%

95Clarke County, IAIA9,5742.2%−30%

96Adair County, IAIA7,4032.1%−7%

97Howard County, IAIA9,4152.1%−38%

98Lucas County, IAIA8,8471.9%−33%

99Ida County, IAIA6,7771.7%−41%

SHOWING 1–99 OF 99

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