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 (2024 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

01Monona County, IAIA8,53911.8%+6.7 pts

02Davis County, IAIA9,23010.2%−3.4 pts

03Van Buren County, IAIA7,1319.4%−1.6 pts

04Woodbury County, IAIA106,6498.7%+4.6 pts

05Fayette County, IAIA19,0478.5%+1.3 pts

06Grundy County, IAIA12,3618.0%+0.9 pts

07Ringgold County, IAIA4,6427.8%−3.5 pts

08Taylor County, IAIA5,8357.4%−4.2 pts

09Adams County, IAIA3,6177.3%+2.3 pts

10Chickasaw County, IAIA11,6637.2%−1.5 pts

11Appanoose County, IAIA12,0777.2%−0.4 pts

12Fremont County, IAIA6,5227.2%−8.2 pts

13Keokuk County, IAIA9,7977.0%−2.3 pts

14Jasper County, IAIA38,1536.8%+0.0 pts

15Plymouth County, IAIA25,6976.7%+0.8 pts

16Hancock County, IAIA10,5286.7%+2.4 pts

17Osceola County, IAIA5,9806.7%+2.4 pts

18Harrison County, IAIA14,6236.7%+1.1 pts

19Des Moines County, IAIA38,0776.6%−2.7 pts

20Muscatine County, IAIA41,8536.5%+0.4 pts

21Wayne County, IAIA6,7386.4%−3.5 pts

22Wapello County, IAIA35,2106.4%−3.9 pts

23Bremer County, IAIA25,2966.3%+0.3 pts

24Clayton County, IAIA16,8456.3%+1.2 pts

25Mahaska County, IAIA21,8806.2%−2.2 pts

26Pottawattamie County, IAIA92,9966.1%+1.4 pts

27Sioux County, IAIA36,7746.1%+2.7 pts

28Mitchell County, IAIA10,6506.0%−1.1 pts

29Washington County, IAIA22,6675.9%−1.3 pts

30Henry County, IAIA19,3495.9%−3.4 pts

31Clay County, IAIA16,2025.9%+1.0 pts

32Jefferson County, IAIA15,2915.8%−0.3 pts

33Lucas County, IAIA8,8475.8%−2.7 pts

34Union County, IAIA11,8295.8%−5.9 pts

35Cass County, IAIA12,9605.8%+0.5 pts

36O'Brien County, IAIA14,2205.8%−1.3 pts

37Buchanan County, IAIA20,8835.6%−1.4 pts

38Hardin County, IAIA16,4555.6%+1.3 pts

39Iowa County, IAIA16,5045.5%+0.9 pts

40Jackson County, IAIA19,2885.4%−1.4 pts

41Ida County, IAIA6,7775.4%+0.7 pts

42Lyon County, IAIA12,3545.3%+0.4 pts

43Poweshiek County, IAIA18,3685.3%+0.1 pts

44Jones County, IAIA21,2535.2%−0.5 pts

45Butler County, IAIA14,0495.2%−1.7 pts

46Dubuque County, IAIA99,3815.1%−0.5 pts

47Pocahontas County, IAIA6,8195.1%−1.4 pts

48Winnebago County, IAIA10,2515.1%+2.3 pts

49Carroll County, IAIA20,3035.1%−0.2 pts

50Wright County, IAIA12,8015.0%−0.6 pts

51Cedar County, IAIA18,3595.0%−1.2 pts

52Floyd County, IAIA14,9014.9%−1.6 pts

53Montgomery County, IAIA10,0024.9%−5.4 pts

54Warren County, IAIA57,3314.9%−1.9 pts

55Monroe County, IAIA7,4064.9%−3.9 pts

56Palo Alto County, IAIA8,8994.8%−1.4 pts

57Benton County, IAIA26,0044.8%+0.6 pts

58Page County, IAIA14,8564.8%−7.2 pts

59Marion County, IAIA34,1924.8%−2.8 pts

60Black Hawk County, IAIA131,5324.7%−2.3 pts

61Cerro Gordo County, IAIA42,3724.7%+0.9 pts

62Mills County, IAIA14,7934.7%−2.4 pts

63Allamakee County, IAIA14,2384.7%−1.0 pts

64Delaware County, IAIA17,6744.7%−1.7 pts

65Decatur County, IAIA7,6554.7%−4.5 pts

66Louisa County, IAIA10,4164.7%−3.7 pts

67Madison County, IAIA17,2704.6%−3.0 pts

68Lee County, IAIA32,3064.6%−4.8 pts

69Emmet County, IAIA9,1074.6%+1.5 pts

70Clarke County, IAIA9,5744.6%−1.6 pts

71Franklin County, IAIA9,8684.6%−1.0 pts

72Calhoun County, IAIA9,5624.6%−0.6 pts

73Boone County, IAIA26,7994.5%−1.2 pts

74Audubon County, IAIA5,5094.4%−1.1 pts

75Guthrie County, IAIA10,7824.3%−5.1 pts

76Sac County, IAIA9,5254.2%−1.6 pts

77Clinton County, IAIA46,0024.2%−2.3 pts

78Winneshiek County, IAIA19,7334.2%+0.8 pts

79Marshall County, IAIA39,8904.1%−0.8 pts

80Adair County, IAIA7,4034.1%−2.2 pts

81Dickinson County, IAIA18,0774.1%+1.6 pts

82Webster County, IAIA36,8383.9%+0.7 pts

83Humboldt County, IAIA9,4093.9%−2.0 pts

84Linn County, IAIA232,0283.8%−0.6 pts

85Cherokee County, IAIA11,3693.7%−1.5 pts

86Worth County, IAIA7,3383.6%+0.3 pts

87Dallas County, IAIA118,4573.5%−2.5 pts

88Shelby County, IAIA11,6893.4%−1.8 pts

89Polk County, IAIA516,5463.3%−1.2 pts

90Scott County, IAIA175,2593.3%−2.5 pts

91Hamilton County, IAIA14,9443.3%−1.5 pts

92Howard County, IAIA9,4153.2%−0.2 pts

93Greene County, IAIA8,6583.2%−2.4 pts

94Crawford County, IAIA16,2373.1%−0.3 pts

95Tama County, IAIA16,7963.1%−3.7 pts

96Kossuth County, IAIA14,3223.0%−1.5 pts

97Story County, IAIA101,2912.9%−0.2 pts

98Johnson County, IAIA160,0442.9%−0.7 pts

99Buena Vista County, IAIA20,4492.2%−1.3 pts

SHOWING 1–99 OF 99

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES