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 (2024 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. The median across all 99 is 11.6%. Biggest climber in the top 100 since 2020: Union County, IA, up 72 places to #17.

Irish Americans: full group profile →

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01▲2Palo Alto County, IAIA8,89921.3%+3.2 pts

02Monroe County, IAIA7,40621.1%+0.4 pts

03▼2Dubuque County, IAIA99,38119.4%−3.9 pts

04▲20Iowa County, IAIA16,50416.5%−1.4 pts

05▲12Madison County, IAIA17,27016.4%−3.4 pts

06▲1Jones County, IAIA21,25316.4%−1.9 pts

07▼1Clinton County, IAIA46,00216.4%−1.7 pts

08▲5Monona County, IAIA8,53916.3%−1.0 pts

09▲14Lee County, IAIA32,30616.2%0.0 pts

10▲28Warren County, IAIA57,33115.8%−0.5 pts

11▲15Benton County, IAIA26,00415.8%−0.9 pts

12▼1Scott County, IAIA175,25915.4%−1.0 pts

13▲3Buchanan County, IAIA20,88315.3%−4.1 pts

14▲22Dallas County, IAIA118,45715.3%−0.6 pts

15▼1Jackson County, IAIA19,28815.3%−0.9 pts

16▼12Allamakee County, IAIA14,23815.1%−3.6 pts

17▲72Union County, IAIA11,82915.0%−1.6 pts

18▲24Lucas County, IAIA8,84714.9%−1.7 pts

19▲20Johnson County, IAIA160,04414.5%−3.1 pts

20▼10Delaware County, IAIA17,67414.3%−3.0 pts

21▼12Adams County, IAIA3,61714.3%−1.6 pts

22▲22Guthrie County, IAIA10,78214.3%+1.0 pts

23▲5Cedar County, IAIA18,35914.3%+0.3 pts

24▼2Fayette County, IAIA19,04714.2%−0.4 pts

25▼5Linn County, IAIA232,02814.0%−4.2 pts

26▲23Humboldt County, IAIA9,40913.8%+2.8 pts

27▲18Fremont County, IAIA6,52213.7%−2.0 pts

28▼7Greene County, IAIA8,65813.5%−2.9 pts

29▼17Harrison County, IAIA14,62313.4%−5.9 pts

30▲13Polk County, IAIA516,54613.3%−2.0 pts

31▲20Carroll County, IAIA20,30313.3%+1.1 pts

32▲32Bremer County, IAIA25,29613.0%+1.2 pts

33▼8Mills County, IAIA14,79312.9%−2.6 pts

34Appanoose County, IAIA12,07712.7%−2.9 pts

35▲12Des Moines County, IAIA38,07712.6%−4.1 pts

36▲31Wayne County, IAIA6,73812.6%−1.3 pts

37▼22Adair County, IAIA7,40312.5%0.0 pts

38▼3Boone County, IAIA26,79912.5%−0.5 pts

39▼8Pottawattamie County, IAIA92,99612.5%−5.7 pts

40▲12Calhoun County, IAIA9,56212.5%−1.2 pts

41▲13Winneshiek County, IAIA19,73312.3%−2.9 pts

42▲26Plymouth County, IAIA25,69712.1%−0.7 pts

43▼38Pocahontas County, IAIA6,81912.1%−0.5 pts

44▼17Cass County, IAIA12,96012.0%−1.8 pts

45▼27Jasper County, IAIA38,15311.9%−2.3 pts

46▼14Washington County, IAIA22,66711.9%−3.3 pts

47▼1Mahaska County, IAIA21,88011.7%−2.4 pts

48▲28Henry County, IAIA19,34911.7%−4.2 pts

49▲28Kossuth County, IAIA14,32211.7%−2.9 pts

50▼21Floyd County, IAIA14,90111.6%+1.1 pts

51▲7Clayton County, IAIA16,84511.6%−1.5 pts

52▲1Webster County, IAIA36,83811.5%−5.7 pts

53▲37Ida County, IAIA6,77711.5%−3.7 pts

54▼14Marion County, IAIA34,19211.5%−2.6 pts

55▼47Poweshiek County, IAIA18,36811.4%−4.3 pts

56Black Hawk County, IAIA131,53211.3%−2.5 pts

57▼7Chickasaw County, IAIA11,66311.2%−1.4 pts

58▼17Van Buren County, IAIA7,13111.1%−2.6 pts

59▲6Dickinson County, IAIA18,07711.1%−1.8 pts

60▼1Mitchell County, IAIA10,65010.9%−1.4 pts

61▼4Woodbury County, IAIA106,64910.9%−4.8 pts

62▲24Cherokee County, IAIA11,36910.8%−3.4 pts

63▼8Story County, IAIA101,29110.7%−2.0 pts

64▼31Page County, IAIA14,85610.7%−6.0 pts

65▲22Butler County, IAIA14,04910.6%−0.7 pts

66▼18Cerro Gordo County, IAIA42,37210.6%−2.7 pts

67▲16Emmet County, IAIA9,10710.4%−3.3 pts

68▼49Keokuk County, IAIA9,79710.3%−6.8 pts

69▲3Tama County, IAIA16,79610.3%−0.8 pts

70▼33Shelby County, IAIA11,68910.3%−2.1 pts

71▼41Ringgold County, IAIA4,64210.3%−7.0 pts

72▼3Decatur County, IAIA7,65510.2%−5.2 pts

73Clay County, IAIA16,20210.1%−2.8 pts

74▼12Wapello County, IAIA35,2109.9%−7.6 pts

75Clarke County, IAIA9,5749.7%−4.0 pts

76▲15Grundy County, IAIA12,3619.7%−5.4 pts

77▼11Jefferson County, IAIA15,2919.7%−3.5 pts

78▼4Taylor County, IAIA5,8359.6%−6.3 pts

79▲6Hancock County, IAIA10,5289.6%+0.5 pts

80▲12Marshall County, IAIA39,8909.5%−3.9 pts

81▼11Louisa County, IAIA10,4169.4%−2.6 pts

82▼11Hardin County, IAIA16,4559.1%−1.9 pts

83▼5Sac County, IAIA9,5259.0%−2.7 pts

84▼23Montgomery County, IAIA10,0028.8%−4.9 pts

85▼1Muscatine County, IAIA41,8538.7%−4.5 pts

86▼5Worth County, IAIA7,3388.5%−3.7 pts

87▼24Davis County, IAIA9,2308.4%−3.7 pts

88▲6Audubon County, IAIA5,5098.0%−2.5 pts

89▼29Howard County, IAIA9,4158.0%−8.1 pts

90▲7Winnebago County, IAIA10,2517.9%−0.3 pts

91▲7O'Brien County, IAIA14,2207.8%+0.6 pts

92▼13Hamilton County, IAIA14,9447.4%−6.0 pts

93▲2Franklin County, IAIA9,8687.2%−3.0 pts

94▼1Crawford County, IAIA16,2376.3%−5.1 pts

95▼15Buena Vista County, IAIA20,4496.2%−4.3 pts

96▼14Wright County, IAIA12,8016.0%−10.4 pts

97▼1Lyon County, IAIA12,3545.8%−2.4 pts

98▼10Osceola County, IAIA5,9805.6%−1.9 pts

99Sioux County, IAIA36,7744.5%−2.1 pts

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES