RANKING · 2024 ACS · 99 SHOWN OF 99

Highest Irish population share, Iowa counties

Iowa counties ranked by the share of all residents who are Irish ancestry (2023 American Community Survey). A concentration measure: Irish 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 Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2000

01Palo Alto County, IAIA8,89921.3%–

02Monroe County, IAIA7,40621.1%–

03Dubuque County, IAIA99,38119.4%–

04Iowa County, IAIA16,50416.5%–

05Madison County, IAIA17,27016.4%–

06Jones County, IAIA21,25316.4%–

07Clinton County, IAIA46,00216.4%–

08Monona County, IAIA8,53916.3%–

09Lee County, IAIA32,30616.2%–

10Warren County, IAIA57,33115.8%–

11Benton County, IAIA26,00415.8%–

12Scott County, IAIA175,25915.4%–

13Buchanan County, IAIA20,88315.3%–

14Dallas County, IAIA118,45715.3%–

15Jackson County, IAIA19,28815.3%–

16Allamakee County, IAIA14,23815.1%–

17Union County, IAIA11,82915.0%–

18Lucas County, IAIA8,84714.9%–

19Johnson County, IAIA160,04414.5%–

20Delaware County, IAIA17,67414.3%–

21Adams County, IAIA3,61714.3%–

22Guthrie County, IAIA10,78214.3%–

23Cedar County, IAIA18,35914.3%–

24Fayette County, IAIA19,04714.2%–

25Linn County, IAIA232,02814.0%–

26Humboldt County, IAIA9,40913.8%–

27Fremont County, IAIA6,52213.7%–

28Greene County, IAIA8,65813.5%–

29Harrison County, IAIA14,62313.4%–

30Polk County, IAIA516,54613.3%–

31Carroll County, IAIA20,30313.3%–

32Bremer County, IAIA25,29613.0%–

33Mills County, IAIA14,79312.9%–

34Appanoose County, IAIA12,07712.7%–

35Des Moines County, IAIA38,07712.6%–

36Wayne County, IAIA6,73812.6%–

37Adair County, IAIA7,40312.5%–

38Boone County, IAIA26,79912.5%–

39Pottawattamie County, IAIA92,99612.5%–

40Calhoun County, IAIA9,56212.5%–

41Winneshiek County, IAIA19,73312.3%–

42Plymouth County, IAIA25,69712.1%–

43Pocahontas County, IAIA6,81912.1%–

44Cass County, IAIA12,96012.0%–

45Jasper County, IAIA38,15311.9%–

46Washington County, IAIA22,66711.9%–

47Mahaska County, IAIA21,88011.7%–

48Henry County, IAIA19,34911.7%–

49Kossuth County, IAIA14,32211.7%–

50Floyd County, IAIA14,90111.6%–

51Clayton County, IAIA16,84511.6%–

52Webster County, IAIA36,83811.5%–

53Ida County, IAIA6,77711.5%–

54Marion County, IAIA34,19211.5%–

55Poweshiek County, IAIA18,36811.4%–

56Black Hawk County, IAIA131,53211.3%–

57Chickasaw County, IAIA11,66311.2%–

58Van Buren County, IAIA7,13111.1%–

59Dickinson County, IAIA18,07711.1%–

60Mitchell County, IAIA10,65010.9%–

61Woodbury County, IAIA106,64910.9%–

62Cherokee County, IAIA11,36910.8%–

63Story County, IAIA101,29110.7%–

64Page County, IAIA14,85610.7%–

65Butler County, IAIA14,04910.6%–

66Cerro Gordo County, IAIA42,37210.6%–

67Emmet County, IAIA9,10710.4%–

68Keokuk County, IAIA9,79710.3%–

69Tama County, IAIA16,79610.3%–

70Shelby County, IAIA11,68910.3%–

71Ringgold County, IAIA4,64210.3%–

72Decatur County, IAIA7,65510.2%–

73Clay County, IAIA16,20210.1%–

74Wapello County, IAIA35,2109.9%–

75Clarke County, IAIA9,5749.7%–

76Grundy County, IAIA12,3619.7%–

77Jefferson County, IAIA15,2919.7%–

78Taylor County, IAIA5,8359.6%–

79Hancock County, IAIA10,5289.6%–

80Marshall County, IAIA39,8909.5%–

81Louisa County, IAIA10,4169.4%–

82Hardin County, IAIA16,4559.1%–

83Sac County, IAIA9,5259.0%–

84Montgomery County, IAIA10,0028.8%–

85Muscatine County, IAIA41,8538.7%–

86Worth County, IAIA7,3388.5%–

87Davis County, IAIA9,2308.4%–

88Audubon County, IAIA5,5098.0%–

89Howard County, IAIA9,4158.0%–

90Winnebago County, IAIA10,2517.9%–

91O'Brien County, IAIA14,2207.8%–

92Hamilton County, IAIA14,9447.4%–

93Franklin County, IAIA9,8687.2%–

94Crawford County, IAIA16,2376.3%–

95Buena Vista County, IAIA20,4496.2%–

96Wright County, IAIA12,8016.0%–

97Lyon County, IAIA12,3545.8%–

98Osceola County, IAIA5,9805.6%–

99Sioux County, IAIA36,7744.5%–

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