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 (2023 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.

IowaAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest American population Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share Largest Iraqi population

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2000

01Wayne County, IAIA6,73810.6%–

02Fayette County, IAIA19,0479.0%–

03Lucas County, IAIA8,8478.8%–

04Davis County, IAIA9,2308.8%–

05Union County, IAIA11,8298.1%–

06Mitchell County, IAIA10,6508.0%–

07Ringgold County, IAIA4,6427.8%–

08Washington County, IAIA22,6677.4%–

09Wapello County, IAIA35,2107.2%–

10Mahaska County, IAIA21,8807.1%–

11Taylor County, IAIA5,8357.0%–

12Monroe County, IAIA7,4066.9%–

13Decatur County, IAIA7,6556.7%–

14Osceola County, IAIA5,9806.7%–

15Fremont County, IAIA6,5226.7%–

16Van Buren County, IAIA7,1316.5%–

17Buchanan County, IAIA20,8836.5%–

18Jasper County, IAIA38,1536.4%–

19Benton County, IAIA26,0046.4%–

20Henry County, IAIA19,3496.4%–

21Madison County, IAIA17,2706.3%–

22Appanoose County, IAIA12,0776.2%–

23Keokuk County, IAIA9,7976.1%–

24Des Moines County, IAIA38,0776.1%–

25Allamakee County, IAIA14,2386.1%–

26Harrison County, IAIA14,6236.1%–

27Jefferson County, IAIA15,2915.9%–

28Palo Alto County, IAIA8,8995.9%–

29Cedar County, IAIA18,3595.8%–

30Clay County, IAIA16,2025.8%–

31Delaware County, IAIA17,6745.8%–

32Lee County, IAIA32,3065.8%–

33Adams County, IAIA3,6175.6%–

34Clayton County, IAIA16,8455.5%–

35Carroll County, IAIA20,3035.3%–

36Greene County, IAIA8,6585.3%–

37Calhoun County, IAIA9,5625.2%–

38Bremer County, IAIA25,2965.2%–

39Marion County, IAIA34,1925.1%–

40Poweshiek County, IAIA18,3685.1%–

41Iowa County, IAIA16,5045.1%–

42Montgomery County, IAIA10,0025.1%–

43Pottawattamie County, IAIA92,9965.1%–

44Adair County, IAIA7,4035.1%–

45Grundy County, IAIA12,3615.0%–

46Butler County, IAIA14,0495.0%–

47Audubon County, IAIA5,5095.0%–

48Guthrie County, IAIA10,7824.9%–

49Cass County, IAIA12,9604.9%–

50Ida County, IAIA6,7774.9%–

51Louisa County, IAIA10,4164.8%–

52Muscatine County, IAIA41,8534.8%–

53Clinton County, IAIA46,0024.8%–

54Warren County, IAIA57,3314.7%–

55Dubuque County, IAIA99,3814.7%–

56Winnebago County, IAIA10,2514.7%–

57Jackson County, IAIA19,2884.6%–

58Webster County, IAIA36,8384.6%–

59Sac County, IAIA9,5254.5%–

60Jones County, IAIA21,2534.4%–

61Shelby County, IAIA11,6894.4%–

62Howard County, IAIA9,4154.4%–

63Monona County, IAIA8,5394.3%–

64Black Hawk County, IAIA131,5324.3%–

65Mills County, IAIA14,7934.2%–

66Pocahontas County, IAIA6,8194.2%–

67Hardin County, IAIA16,4554.2%–

68Page County, IAIA14,8564.2%–

69Dallas County, IAIA118,4574.2%–

70Linn County, IAIA232,0284.1%–

71O'Brien County, IAIA14,2204.1%–

72Scott County, IAIA175,2594.0%–

73Crawford County, IAIA16,2374.0%–

74Cerro Gordo County, IAIA42,3723.9%–

75Kossuth County, IAIA14,3223.9%–

76Polk County, IAIA516,5463.9%–

77Humboldt County, IAIA9,4093.9%–

78Hancock County, IAIA10,5283.8%–

79Cherokee County, IAIA11,3693.8%–

80Chickasaw County, IAIA11,6633.7%–

81Woodbury County, IAIA106,6493.7%–

82Boone County, IAIA26,7993.7%–

83Johnson County, IAIA160,0443.6%–

84Dickinson County, IAIA18,0773.6%–

85Marshall County, IAIA39,8903.6%–

86Tama County, IAIA16,7963.6%–

87Franklin County, IAIA9,8683.5%–

88Sioux County, IAIA36,7743.4%–

89Plymouth County, IAIA25,6973.4%–

90Floyd County, IAIA14,9013.4%–

91Lyon County, IAIA12,3543.2%–

92Winneshiek County, IAIA19,7333.2%–

93Clarke County, IAIA9,5743.2%–

94Hamilton County, IAIA14,9443.1%–

95Emmet County, IAIA9,1073.0%–

96Wright County, IAIA12,8012.6%–

97Story County, IAIA101,2912.6%–

98Worth County, IAIA7,3382.5%–

99Buena Vista County, IAIA20,4492.3%–

SHOWING 1–99 OF 99

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