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. The median across all 99 is 5.0%. Biggest climber in the top 100 since 2020: Woodbury County, IA, up 77 places to #4.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPAMERICAN SHAREVS 2010

01▲62Monona County, IAIA8,53911.8%+6.7 pts

02▲2Davis County, IAIA9,23010.2%−3.4 pts

03▲13Van Buren County, IAIA7,1319.4%−1.6 pts

04▲77Woodbury County, IAIA106,6498.7%+4.6 pts

05▼3Fayette County, IAIA19,0478.5%+1.3 pts

06▲39Grundy County, IAIA12,3618.0%+0.9 pts

07Ringgold County, IAIA4,6427.8%−3.5 pts

08▲3Taylor County, IAIA5,8357.4%−4.2 pts

09▲24Adams County, IAIA3,6177.3%+2.3 pts

10▲70Chickasaw County, IAIA11,6637.2%−1.5 pts

11▲11Appanoose County, IAIA12,0777.2%−0.4 pts

12▲3Fremont County, IAIA6,5227.2%−8.2 pts

13▲10Keokuk County, IAIA9,7977.0%−2.3 pts

14▲4Jasper County, IAIA38,1536.8%0.0 pts

15▲74Plymouth County, IAIA25,6976.7%+0.8 pts

16▲62Hancock County, IAIA10,5286.7%+2.4 pts

17▼3Osceola County, IAIA5,9806.7%+2.4 pts

18▲8Harrison County, IAIA14,6236.7%+1.1 pts

19▲5Des Moines County, IAIA38,0776.6%−2.7 pts

20▲32Muscatine County, IAIA41,8536.5%+0.4 pts

21▼20Wayne County, IAIA6,7386.4%−3.5 pts

22▼13Wapello County, IAIA35,2106.4%−3.9 pts

23▲15Bremer County, IAIA25,2966.3%+0.3 pts

24▲10Clayton County, IAIA16,8456.3%+1.2 pts

25▼15Mahaska County, IAIA21,8806.2%−2.2 pts

26▲17Pottawattamie County, IAIA92,9966.1%+1.4 pts

27▲61Sioux County, IAIA36,7746.1%+2.7 pts

28▼22Mitchell County, IAIA10,6506.0%−1.1 pts

29▼21Washington County, IAIA22,6675.9%−1.3 pts

30▼10Henry County, IAIA19,3495.9%−3.4 pts

31▼1Clay County, IAIA16,2025.9%+1.0 pts

32▼5Jefferson County, IAIA15,2915.8%−0.3 pts

33▼30Lucas County, IAIA8,8475.8%−2.7 pts

34▼29Union County, IAIA11,8295.8%−5.9 pts

35▲14Cass County, IAIA12,9605.8%+0.5 pts

36▲35O'Brien County, IAIA14,2205.8%−1.3 pts

37▼20Buchanan County, IAIA20,8835.6%−1.4 pts

38▲29Hardin County, IAIA16,4555.6%+1.3 pts

39▲2Iowa County, IAIA16,5045.5%+0.9 pts

40▲17Jackson County, IAIA19,2885.4%−1.4 pts

41▲9Ida County, IAIA6,7775.4%+0.7 pts

42▲49Lyon County, IAIA12,3545.3%+0.4 pts

43▼3Poweshiek County, IAIA18,3685.3%+0.1 pts

44▲16Jones County, IAIA21,2535.2%−0.5 pts

45▲1Butler County, IAIA14,0495.2%−1.7 pts

46▲9Dubuque County, IAIA99,3815.1%−0.5 pts

47▲19Pocahontas County, IAIA6,8195.1%−1.4 pts

48▲8Winnebago County, IAIA10,2515.1%+2.3 pts

49▼14Carroll County, IAIA20,3035.1%−0.2 pts

50▲46Wright County, IAIA12,8015.0%−0.6 pts

51▼22Cedar County, IAIA18,3595.0%−1.2 pts

52▲38Floyd County, IAIA14,9014.9%−1.6 pts

53▼11Montgomery County, IAIA10,0024.9%−5.4 pts

54Warren County, IAIA57,3314.9%−1.9 pts

55▼43Monroe County, IAIA7,4064.9%−3.9 pts

56▼28Palo Alto County, IAIA8,8994.8%−1.4 pts

57▼38Benton County, IAIA26,0044.8%+0.6 pts

58▲10Page County, IAIA14,8564.8%−7.2 pts

59▼20Marion County, IAIA34,1924.8%−2.8 pts

60▲4Black Hawk County, IAIA131,5324.7%−2.3 pts

61▲13Cerro Gordo County, IAIA42,3724.7%+0.9 pts

62▲3Mills County, IAIA14,7934.7%−2.4 pts

63▼38Allamakee County, IAIA14,2384.7%−1.0 pts

64▼33Delaware County, IAIA17,6744.7%−1.7 pts

65▼52Decatur County, IAIA7,6554.7%−4.5 pts

66▼15Louisa County, IAIA10,4164.7%−3.7 pts

67▼46Madison County, IAIA17,2704.6%−3.0 pts

68▼36Lee County, IAIA32,3064.6%−4.8 pts

69▲26Emmet County, IAIA9,1074.6%+1.5 pts

70▲23Clarke County, IAIA9,5744.6%−1.6 pts

71▲16Franklin County, IAIA9,8684.6%−1.0 pts

72▼35Calhoun County, IAIA9,5624.6%−0.6 pts

73▲9Boone County, IAIA26,7994.5%−1.2 pts

74▼27Audubon County, IAIA5,5094.4%−1.1 pts

75▼27Guthrie County, IAIA10,7824.3%−5.1 pts

76▼17Sac County, IAIA9,5254.2%−1.6 pts

77▼24Clinton County, IAIA46,0024.2%−2.3 pts

78▲14Winneshiek County, IAIA19,7334.2%+0.8 pts

79▲6Marshall County, IAIA39,8904.1%−0.8 pts

80▼36Adair County, IAIA7,4034.1%−2.2 pts

81▲3Dickinson County, IAIA18,0774.1%+1.6 pts

82▼24Webster County, IAIA36,8383.9%+0.7 pts

83▼6Humboldt County, IAIA9,4093.9%−2.0 pts

84▼14Linn County, IAIA232,0283.8%−0.6 pts

85▼6Cherokee County, IAIA11,3693.7%−1.5 pts

86▲12Worth County, IAIA7,3383.6%+0.3 pts

87▼18Dallas County, IAIA118,4573.5%−2.5 pts

88▼27Shelby County, IAIA11,6893.4%−1.8 pts

89▼13Polk County, IAIA516,5463.3%−1.2 pts

90▼18Scott County, IAIA175,2593.3%−2.5 pts

91▲3Hamilton County, IAIA14,9443.3%−1.5 pts

92▼30Howard County, IAIA9,4153.2%−0.2 pts

93▼57Greene County, IAIA8,6583.2%−2.4 pts

94▼21Crawford County, IAIA16,2373.1%−0.3 pts

95▼9Tama County, IAIA16,7963.1%−3.7 pts

96▼21Kossuth County, IAIA14,3223.0%−1.5 pts

97Story County, IAIA101,2912.9%−0.2 pts

98▼15Johnson 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 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES