RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest American population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are American ancestry (2020 American Community Survey). A concentration measure: American residents as a percentage of total population. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2010

01Wayne County, IAIA6,73810.6%+0.7 pts

02Fayette County, IAIA19,0479.0%+1.7 pts

03Lucas County, IAIA8,8478.8%+0.3 pts

04Davis County, IAIA9,2308.8%−4.8 pts

05Union County, IAIA11,8298.1%−3.6 pts

06Mitchell County, IAIA10,6508.0%+0.9 pts

07Ringgold County, IAIA4,6427.8%−3.5 pts

08Washington County, IAIA22,6677.4%+0.2 pts

09Wapello County, IAIA35,2107.2%−3.0 pts

10Mahaska County, IAIA21,8807.1%−1.3 pts

11Taylor County, IAIA5,8357.0%−4.5 pts

12Monroe County, IAIA7,4066.9%−1.8 pts

13Decatur County, IAIA7,6556.7%−2.5 pts

14Osceola County, IAIA5,9806.7%+2.4 pts

15Fremont County, IAIA6,5226.7%−8.8 pts

16Van Buren County, IAIA7,1316.5%−4.4 pts

17Buchanan County, IAIA20,8836.5%−0.6 pts

18Jasper County, IAIA38,1536.4%−0.4 pts

19Benton County, IAIA26,0046.4%+2.2 pts

20Henry County, IAIA19,3496.4%−2.9 pts

21Madison County, IAIA17,2706.3%−1.4 pts

22Appanoose County, IAIA12,0776.2%−1.4 pts

23Keokuk County, IAIA9,7976.1%−3.2 pts

24Des Moines County, IAIA38,0776.1%−3.2 pts

25Allamakee County, IAIA14,2386.1%+0.4 pts

26Harrison County, IAIA14,6236.1%+0.5 pts

27Jefferson County, IAIA15,2915.9%−0.2 pts

28Palo Alto County, IAIA8,8995.9%−0.3 pts

29Cedar County, IAIA18,3595.8%−0.4 pts

30Clay County, IAIA16,2025.8%+1.0 pts

31Delaware County, IAIA17,6745.8%−0.6 pts

32Lee County, IAIA32,3065.8%−3.7 pts

33Adams County, IAIA3,6175.6%+0.7 pts

34Clayton County, IAIA16,8455.5%+0.5 pts

35Carroll County, IAIA20,3035.3%+0.0 pts

36Greene County, IAIA8,6585.3%−0.3 pts

37Calhoun County, IAIA9,5625.2%+0.0 pts

38Bremer County, IAIA25,2965.2%−0.8 pts

39Marion County, IAIA34,1925.1%−2.4 pts

40Poweshiek County, IAIA18,3685.1%−0.0 pts

41Iowa County, IAIA16,5045.1%+0.5 pts

42Montgomery County, IAIA10,0025.1%−5.1 pts

43Pottawattamie County, IAIA92,9965.1%+0.4 pts

44Adair County, IAIA7,4035.1%−1.3 pts

45Grundy County, IAIA12,3615.0%−2.1 pts

46Butler County, IAIA14,0495.0%−1.8 pts

47Audubon County, IAIA5,5095.0%−0.6 pts

48Guthrie County, IAIA10,7824.9%−4.5 pts

49Cass County, IAIA12,9604.9%−0.4 pts

50Ida County, IAIA6,7774.9%+0.2 pts

51Louisa County, IAIA10,4164.8%−3.5 pts

52Muscatine County, IAIA41,8534.8%−1.3 pts

53Clinton County, IAIA46,0024.8%−1.7 pts

54Warren County, IAIA57,3314.7%−2.0 pts

55Dubuque County, IAIA99,3814.7%−0.9 pts

56Winnebago County, IAIA10,2514.7%+1.8 pts

57Jackson County, IAIA19,2884.6%−2.1 pts

58Webster County, IAIA36,8384.6%+1.4 pts

59Sac County, IAIA9,5254.5%−1.3 pts

60Jones County, IAIA21,2534.4%−1.2 pts

61Shelby County, IAIA11,6894.4%−0.7 pts

62Howard County, IAIA9,4154.4%+1.0 pts

63Monona County, IAIA8,5394.3%−0.8 pts

64Black Hawk County, IAIA131,5324.3%−2.8 pts

65Mills County, IAIA14,7934.2%−2.9 pts

66Pocahontas County, IAIA6,8194.2%−2.3 pts

67Hardin County, IAIA16,4554.2%−0.1 pts

68Page County, IAIA14,8564.2%−7.8 pts

69Dallas County, IAIA118,4574.2%−1.8 pts

70Linn County, IAIA232,0284.1%−0.2 pts

71O'Brien County, IAIA14,2204.1%−3.0 pts

72Scott County, IAIA175,2594.0%−1.8 pts

73Crawford County, IAIA16,2374.0%+0.5 pts

74Cerro Gordo County, IAIA42,3723.9%+0.1 pts

75Kossuth County, IAIA14,3223.9%−0.6 pts

76Polk County, IAIA516,5463.9%−0.6 pts

77Humboldt County, IAIA9,4093.9%−2.1 pts

78Hancock County, IAIA10,5283.8%−0.5 pts

79Cherokee County, IAIA11,3693.8%−1.4 pts

80Chickasaw County, IAIA11,6633.7%−5.0 pts

81Woodbury County, IAIA106,6493.7%−0.4 pts

82Boone County, IAIA26,7993.7%−1.9 pts

83Johnson County, IAIA160,0443.6%+0.0 pts

84Dickinson County, IAIA18,0773.6%+1.1 pts

85Marshall County, IAIA39,8903.6%−1.3 pts

86Tama County, IAIA16,7963.6%−3.3 pts

87Franklin County, IAIA9,8683.5%−2.1 pts

88Sioux County, IAIA36,7743.4%−0.0 pts

89Plymouth County, IAIA25,6973.4%−2.6 pts

90Floyd County, IAIA14,9013.4%−3.2 pts

91Lyon County, IAIA12,3543.2%−1.7 pts

92Winneshiek County, IAIA19,7333.2%−0.2 pts

93Clarke County, IAIA9,5743.2%−3.1 pts

94Hamilton County, IAIA14,9443.1%−1.7 pts

95Emmet County, IAIA9,1073.0%−0.1 pts

96Wright County, IAIA12,8012.6%−2.9 pts

97Story County, IAIA101,2912.6%−0.4 pts

98Worth County, IAIA7,3382.5%−0.9 pts

99Buena Vista County, IAIA20,4492.3%−1.2 pts

SHOWING 1–99 OF 99

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS