RANKING · 2010 CENSUS · 99 SHOWN OF 99

Highest American population share, Iowa counties · 2010

Iowa counties ranked by the share of all residents who are American ancestry (2010 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.

American ancestry: full group profile →

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 –

01Fremont County, IAIA6,52215.5%–

02Davis County, IAIA9,23013.6%–

03Page County, IAIA14,85612.0%–

04Union County, IAIA11,82911.7%–

05Taylor County, IAIA5,83511.6%–

06Ringgold County, IAIA4,64211.4%–

07Van Buren County, IAIA7,13110.9%–

08Montgomery County, IAIA10,00210.2%–

09Wapello County, IAIA35,21010.2%–

10Wayne County, IAIA6,7389.9%–

11Lee County, IAIA32,3069.4%–

12Guthrie County, IAIA10,7829.4%–

13Keokuk County, IAIA9,7979.4%–

14Des Moines County, IAIA38,0779.3%–

15Henry County, IAIA19,3499.2%–

16Decatur County, IAIA7,6559.2%–

17Monroe County, IAIA7,4068.8%–

18Chickasaw County, IAIA11,6638.8%–

19Lucas County, IAIA8,8478.5%–

20Mahaska County, IAIA21,8808.4%–

21Louisa County, IAIA10,4168.3%–

22Madison County, IAIA17,2707.6%–

23Appanoose County, IAIA12,0777.6%–

24Marion County, IAIA34,1927.5%–

25Fayette County, IAIA19,0477.2%–

26Washington County, IAIA22,6677.2%–

27Mills County, IAIA14,7937.1%–

28Mitchell County, IAIA10,6507.1%–

29Grundy County, IAIA12,3617.1%–

30O'Brien County, IAIA14,2207.1%–

31Black Hawk County, IAIA131,5327.0%–

32Buchanan County, IAIA20,8837.0%–

33Butler County, IAIA14,0496.9%–

34Tama County, IAIA16,7966.9%–

35Jasper County, IAIA38,1536.8%–

36Jackson County, IAIA19,2886.8%–

37Warren County, IAIA57,3316.7%–

38Floyd County, IAIA14,9016.5%–

39Clinton County, IAIA46,0026.5%–

40Pocahontas County, IAIA6,8196.5%–

41Delaware County, IAIA17,6746.4%–

42Adair County, IAIA7,4036.4%–

43Clarke County, IAIA9,5746.3%–

44Cedar County, IAIA18,3596.2%–

45Palo Alto County, IAIA8,8996.2%–

46Muscatine County, IAIA41,8536.2%–

47Jefferson County, IAIA15,2916.2%–

48Plymouth County, IAIA25,6976.0%–

49Bremer County, IAIA25,2966.0%–

50Dallas County, IAIA118,4576.0%–

51Humboldt County, IAIA9,4095.9%–

52Sac County, IAIA9,5255.8%–

53Scott County, IAIA175,2595.8%–

54Allamakee County, IAIA14,2385.7%–

55Jones County, IAIA21,2535.7%–

56Boone County, IAIA26,7995.6%–

57Greene County, IAIA8,6585.6%–

58Dubuque County, IAIA99,3815.6%–

59Franklin County, IAIA9,8685.6%–

60Wright County, IAIA12,8015.6%–

61Audubon County, IAIA5,5095.6%–

62Harrison County, IAIA14,6235.6%–

63Carroll County, IAIA20,3035.3%–

64Cass County, IAIA12,9605.2%–

65Calhoun County, IAIA9,5625.2%–

66Cherokee County, IAIA11,3695.2%–

67Poweshiek County, IAIA18,3685.2%–

68Shelby County, IAIA11,6895.2%–

69Clayton County, IAIA16,8455.1%–

70Monona County, IAIA8,5395.0%–

71Adams County, IAIA3,6174.9%–

72Lyon County, IAIA12,3544.9%–

73Marshall County, IAIA39,8904.9%–

74Clay County, IAIA16,2024.8%–

75Hamilton County, IAIA14,9444.8%–

76Ida County, IAIA6,7774.7%–

77Pottawattamie County, IAIA92,9964.7%–

78Iowa County, IAIA16,5044.6%–

79Kossuth County, IAIA14,3224.5%–

80Polk County, IAIA516,5464.5%–

81Linn County, IAIA232,0284.3%–

82Osceola County, IAIA5,9804.3%–

83Hancock County, IAIA10,5284.3%–

84Hardin County, IAIA16,4554.3%–

85Benton County, IAIA26,0044.2%–

86Woodbury County, IAIA106,6494.1%–

87Cerro Gordo County, IAIA42,3723.8%–

88Johnson County, IAIA160,0443.6%–

89Buena Vista County, IAIA20,4493.5%–

90Crawford County, IAIA16,2373.4%–

91Sioux County, IAIA36,7743.4%–

92Howard County, IAIA9,4153.4%–

93Winneshiek County, IAIA19,7333.4%–

94Worth County, IAIA7,3383.4%–

95Webster County, IAIA36,8383.2%–

96Emmet County, IAIA9,1073.1%–

97Story County, IAIA101,2913.1%–

98Winnebago County, IAIA10,2512.8%–

99Dickinson County, IAIA18,0772.5%–

SHOWING 1–99 OF 99

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