RANKING · 2024 ACS · 99 SHOWN OF 99

Highest American population share, Iowa counties

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

01Monona County, IAIA8,53911.8%–

02Davis County, IAIA9,23010.2%–

03Van Buren County, IAIA7,1319.4%–

04Woodbury County, IAIA106,6498.7%–

05Fayette County, IAIA19,0478.5%–

06Grundy County, IAIA12,3618.0%–

07Ringgold County, IAIA4,6427.8%–

08Taylor County, IAIA5,8357.4%–

09Adams County, IAIA3,6177.3%–

10Chickasaw County, IAIA11,6637.2%–

11Appanoose County, IAIA12,0777.2%–

12Fremont County, IAIA6,5227.2%–

13Keokuk County, IAIA9,7977.0%–

14Jasper County, IAIA38,1536.8%–

15Plymouth County, IAIA25,6976.7%–

16Hancock County, IAIA10,5286.7%–

17Osceola County, IAIA5,9806.7%–

18Harrison County, IAIA14,6236.7%–

19Des Moines County, IAIA38,0776.6%–

20Muscatine County, IAIA41,8536.5%–

21Wayne County, IAIA6,7386.4%–

22Wapello County, IAIA35,2106.4%–

23Bremer County, IAIA25,2966.3%–

24Clayton County, IAIA16,8456.3%–

25Mahaska County, IAIA21,8806.2%–

26Pottawattamie County, IAIA92,9966.1%–

27Sioux County, IAIA36,7746.1%–

28Mitchell County, IAIA10,6506.0%–

29Washington County, IAIA22,6675.9%–

30Henry County, IAIA19,3495.9%–

31Clay County, IAIA16,2025.9%–

32Jefferson County, IAIA15,2915.8%–

33Lucas County, IAIA8,8475.8%–

34Union County, IAIA11,8295.8%–

35Cass County, IAIA12,9605.8%–

36O'Brien County, IAIA14,2205.8%–

37Buchanan County, IAIA20,8835.6%–

38Hardin County, IAIA16,4555.6%–

39Iowa County, IAIA16,5045.5%–

40Jackson County, IAIA19,2885.4%–

41Ida County, IAIA6,7775.4%–

42Lyon County, IAIA12,3545.3%–

43Poweshiek County, IAIA18,3685.3%–

44Jones County, IAIA21,2535.2%–

45Butler County, IAIA14,0495.2%–

46Dubuque County, IAIA99,3815.1%–

47Pocahontas County, IAIA6,8195.1%–

48Winnebago County, IAIA10,2515.1%–

49Carroll County, IAIA20,3035.1%–

50Wright County, IAIA12,8015.0%–

51Cedar County, IAIA18,3595.0%–

52Floyd County, IAIA14,9014.9%–

53Montgomery County, IAIA10,0024.9%–

54Warren County, IAIA57,3314.9%–

55Monroe County, IAIA7,4064.9%–

56Palo Alto County, IAIA8,8994.8%–

57Benton County, IAIA26,0044.8%–

58Page County, IAIA14,8564.8%–

59Marion County, IAIA34,1924.8%–

60Black Hawk County, IAIA131,5324.7%–

61Cerro Gordo County, IAIA42,3724.7%–

62Mills County, IAIA14,7934.7%–

63Allamakee County, IAIA14,2384.7%–

64Delaware County, IAIA17,6744.7%–

65Decatur County, IAIA7,6554.7%–

66Louisa County, IAIA10,4164.7%–

67Madison County, IAIA17,2704.6%–

68Lee County, IAIA32,3064.6%–

69Emmet County, IAIA9,1074.6%–

70Clarke County, IAIA9,5744.6%–

71Franklin County, IAIA9,8684.6%–

72Calhoun County, IAIA9,5624.6%–

73Boone County, IAIA26,7994.5%–

74Audubon County, IAIA5,5094.4%–

75Guthrie County, IAIA10,7824.3%–

76Sac County, IAIA9,5254.2%–

77Clinton County, IAIA46,0024.2%–

78Winneshiek County, IAIA19,7334.2%–

79Marshall County, IAIA39,8904.1%–

80Adair County, IAIA7,4034.1%–

81Dickinson County, IAIA18,0774.1%–

82Webster County, IAIA36,8383.9%–

83Humboldt County, IAIA9,4093.9%–

84Linn County, IAIA232,0283.8%–

85Cherokee County, IAIA11,3693.7%–

86Worth County, IAIA7,3383.6%–

87Dallas County, IAIA118,4573.5%–

88Shelby County, IAIA11,6893.4%–

89Polk County, IAIA516,5463.3%–

90Scott County, IAIA175,2593.3%–

91Hamilton County, IAIA14,9443.3%–

92Howard County, IAIA9,4153.2%–

93Greene County, IAIA8,6583.2%–

94Crawford County, IAIA16,2373.1%–

95Tama County, IAIA16,7963.1%–

96Kossuth County, IAIA14,3223.0%–

97Story County, IAIA101,2912.9%–

98Johnson County, IAIA160,0442.9%–

99Buena Vista County, IAIA20,4492.2%–

SHOWING 1–99 OF 99

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