RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Irish population share, Iowa counties · 2020

Iowa counties ranked by the share of all residents who are Irish ancestry (2020 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 12.3%.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01Dubuque County, IAIA99,38120.2%−3.1 pts

02Monroe County, IAIA7,40618.9%−1.8 pts

03Palo Alto County, IAIA8,89918.4%+0.4 pts

04Allamakee County, IAIA14,23817.4%−1.3 pts

05Pocahontas County, IAIA6,81917.3%+4.7 pts

06Clinton County, IAIA46,00217.2%−0.8 pts

07Jones County, IAIA21,25317.1%−1.2 pts

08Poweshiek County, IAIA18,36816.7%+1.0 pts

09Adams County, IAIA3,61715.8%−0.1 pts

10Delaware County, IAIA17,67415.8%−1.6 pts

11Scott County, IAIA175,25915.7%−0.7 pts

12Harrison County, IAIA14,62315.4%−3.9 pts

13Monona County, IAIA8,53915.4%−2.0 pts

14Jackson County, IAIA19,28815.2%−1.0 pts

15Adair County, IAIA7,40315.1%+2.5 pts

16Buchanan County, IAIA20,88315.0%−4.4 pts

17Madison County, IAIA17,27014.9%−4.9 pts

18Jasper County, IAIA38,15314.5%+0.3 pts

19Keokuk County, IAIA9,79714.5%−2.7 pts

20Linn County, IAIA232,02814.4%−3.9 pts

21Greene County, IAIA8,65814.4%−2.1 pts

22Fayette County, IAIA19,04714.3%−0.2 pts

23Lee County, IAIA32,30614.3%−1.8 pts

24Iowa County, IAIA16,50414.3%−3.6 pts

25Mills County, IAIA14,79314.2%−1.3 pts

26Benton County, IAIA26,00414.1%−2.6 pts

27Cass County, IAIA12,96014.1%+0.3 pts

28Cedar County, IAIA18,35914.1%0.0 pts

29Floyd County, IAIA14,90114.0%+3.5 pts

30Ringgold County, IAIA4,64213.9%−3.5 pts

31Pottawattamie County, IAIA92,99613.8%−4.4 pts

32Washington County, IAIA22,66713.7%−1.5 pts

33Page County, IAIA14,85613.6%−3.1 pts

34Appanoose County, IAIA12,07713.6%−2.1 pts

35Boone County, IAIA26,79913.5%+0.5 pts

36Dallas County, IAIA118,45713.5%−2.4 pts

37Shelby County, IAIA11,68913.4%+1.0 pts

38Warren County, IAIA57,33113.4%−2.9 pts

39Johnson County, IAIA160,04413.2%−4.4 pts

40Marion County, IAIA34,19213.2%−0.9 pts

41Van Buren County, IAIA7,13113.1%−0.7 pts

42Lucas County, IAIA8,84713.0%−3.5 pts

43Polk County, IAIA516,54612.9%−2.4 pts

44Guthrie County, IAIA10,78212.8%−0.5 pts

45Fremont County, IAIA6,52212.7%−3.0 pts

46Mahaska County, IAIA21,88012.7%−1.5 pts

47Des Moines County, IAIA38,07712.6%−4.1 pts

48Cerro Gordo County, IAIA42,37212.5%−0.8 pts

49Humboldt County, IAIA9,40912.4%+1.3 pts

50Chickasaw County, IAIA11,66312.3%−0.3 pts

51Carroll County, IAIA20,30312.2%0.0 pts

52Calhoun County, IAIA9,56212.1%−1.6 pts

53Webster County, IAIA36,83812.1%−5.2 pts

54Winneshiek County, IAIA19,73312.0%−3.2 pts

55Story County, IAIA101,29112.0%−0.7 pts

56Black Hawk County, IAIA131,53212.0%−1.9 pts

57Woodbury County, IAIA106,64912.0%−3.8 pts

58Clayton County, IAIA16,84512.0%−1.1 pts

59Mitchell County, IAIA10,65011.4%−1.0 pts

60Howard County, IAIA9,41511.3%−4.7 pts

61Montgomery County, IAIA10,00211.3%−2.3 pts

62Wapello County, IAIA35,21011.3%−6.2 pts

63Davis County, IAIA9,23011.2%−0.8 pts

64Bremer County, IAIA25,29611.2%−0.6 pts

65Dickinson County, IAIA18,07711.1%−1.8 pts

66Jefferson County, IAIA15,29111.1%−2.0 pts

67Wayne County, IAIA6,73810.9%−3.0 pts

68Plymouth County, IAIA25,69710.7%−2.1 pts

69Decatur County, IAIA7,65510.7%−4.7 pts

70Louisa County, IAIA10,41610.5%−1.5 pts

71Hardin County, IAIA16,45510.5%−0.5 pts

72Tama County, IAIA16,79610.4%−0.7 pts

73Clay County, IAIA16,20210.3%−2.6 pts

74Taylor County, IAIA5,83510.0%−5.8 pts

75Clarke County, IAIA9,57410.0%−3.6 pts

76Henry County, IAIA19,3499.9%−6.1 pts

77Kossuth County, IAIA14,3229.8%−4.8 pts

78Sac County, IAIA9,5259.7%−2.0 pts

79Hamilton County, IAIA14,9449.7%−3.7 pts

80Buena Vista County, IAIA20,4499.6%−1.0 pts

81Worth County, IAIA7,3389.6%−2.7 pts

82Wright County, IAIA12,8019.6%−6.8 pts

83Emmet County, IAIA9,1079.4%−4.4 pts

84Muscatine County, IAIA41,8539.3%−3.8 pts

85Hancock County, IAIA10,5289.2%+0.1 pts

86Cherokee County, IAIA11,3699.0%−5.3 pts

87Butler County, IAIA14,0498.9%−2.4 pts

88Osceola County, IAIA5,9808.9%+1.4 pts

89Union County, IAIA11,8298.8%−7.7 pts

90Ida County, IAIA6,7778.7%−6.5 pts

91Grundy County, IAIA12,3618.3%−6.8 pts

92Marshall County, IAIA39,8907.9%−5.5 pts

93Crawford County, IAIA16,2377.9%−3.5 pts

94Audubon County, IAIA5,5097.6%−2.9 pts

95Franklin County, IAIA9,8687.4%−2.8 pts

96Lyon County, IAIA12,3547.1%−1.1 pts

97Winnebago County, IAIA10,2515.8%−2.5 pts

98O'Brien County, IAIA14,2205.5%−1.6 pts

99Sioux County, IAIA36,7744.9%−1.7 pts

SHOWING 1–99 OF 99

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS