RANKING · 2024 ACS · 99 SHOWN OF 99

Largest Irish population, Iowa counties

Iowa counties ranked by the number of residents who are Irish ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 1,668. Biggest climber in the top 100 since 2020: Union County, IA, up 29 places to #46.

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IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS 2010

01Polk County, IAIA516,54666,949+4%

02Linn County, IAIA232,02832,213−15%

03Scott County, IAIA175,25926,830+1%

04Johnson County, IAIA160,04422,790+2%

05Dubuque County, IAIA99,38119,172−11%

06▲3Dallas County, IAIA118,45716,516+68%

07▼1Black Hawk County, IAIA131,53214,868−17%

08▼1Pottawattamie County, IAIA92,99611,706−30%

09▼1Woodbury County, IAIA106,64911,560−27%

10Story County, IAIA101,29110,771−3%

11▲1Warren County, IAIA57,3318,619+16%

12▼1Clinton County, IAIA46,0027,575−15%

13▲3Lee County, IAIA32,3065,328−9%

14▲1Des Moines County, IAIA38,0774,857−28%

15▼2Jasper County, IAIA38,1534,519−14%

16▼2Cerro Gordo County, IAIA42,3724,498−24%

17Webster County, IAIA36,8384,254−36%

18▲3Benton County, IAIA26,0044,061−7%

19▼1Marion County, IAIA34,1923,862−18%

20▲5Marshall County, IAIA39,8903,811−29%

21▼2Muscatine County, IAIA41,8533,706−34%

22▼2Wapello County, IAIA35,2103,505−44%

23Jones County, IAIA21,2533,432−10%

24▼2Boone County, IAIA26,7993,346−3%

25▲6Bremer County, IAIA25,2963,281+15%

26▼2Buchanan County, IAIA20,8833,166−22%

27▲5Plymouth County, IAIA25,6973,111−3%

28Jackson County, IAIA19,2882,965−8%

29▲8Madison County, IAIA17,2702,784−9%

30▲5Carroll County, IAIA20,3032,733+8%

31▼1Fayette County, IAIA19,0472,732−11%

32▲7Iowa County, IAIA16,5042,731−7%

33▼6Washington County, IAIA22,6672,683−19%

34Cedar County, IAIA18,3592,628+2%

35▼6Mahaska County, IAIA21,8802,585−18%

36▼3Delaware County, IAIA17,6742,519−19%

37▼1Winneshiek County, IAIA19,7332,450−24%

38▲8Henry County, IAIA19,3492,348−27%

39▼1Allamakee County, IAIA14,2382,131−21%

40▼14Poweshiek County, IAIA18,3682,120−29%

41▲6Dickinson County, IAIA18,0771,997−7%

42▲1Clayton County, IAIA16,8451,967−17%

43▼2Harrison County, IAIA14,6231,960−33%

44▲11Palo Alto County, IAIA8,8991,887+10%

45▼3Mills County, IAIA14,7931,882−20%

46▲29Union County, IAIA11,8291,793−13%

47▼7Floyd County, IAIA14,9011,782+3%

48▲3Tama County, IAIA16,7961,743−13%

49▲11Kossuth County, IAIA14,3221,700−26%

50▲4Clay County, IAIA16,2021,668−23%

51▲1Sioux County, IAIA36,7741,625−26%

52▼8Page County, IAIA14,8561,619−40%

53▲6Monroe County, IAIA7,4061,587−3%

54▼5Cass County, IAIA12,9601,567−19%

55▼2Appanoose County, IAIA12,0771,553−24%

56▲6Guthrie County, IAIA10,7821,531+4%

57▲8Butler County, IAIA14,0491,517−10%

58▼13Jefferson County, IAIA15,2911,517−31%

59▼9Hardin County, IAIA16,4551,515−22%

60▲4Monona County, IAIA8,5391,392−14%

61▲8Humboldt County, IAIA9,4091,328+21%

62▼4Chickasaw County, IAIA11,6631,327−16%

63▲11Lucas County, IAIA8,8471,298−14%

64▼16Buena Vista County, IAIA20,4491,295−39%

65▲14Cherokee County, IAIA11,3691,258−27%

66▲4Calhoun County, IAIA9,5621,227−9%

67▼11Shelby County, IAIA11,6891,217−21%

68▲10Grundy County, IAIA12,3611,198−36%

69▼3Greene County, IAIA8,6581,174−25%

70▼2Mitchell County, IAIA10,6501,151−14%

71▼10Hamilton County, IAIA14,9441,102−48%

72▲17O'Brien County, IAIA14,2201,101+7%

73▼10Crawford County, IAIA16,2371,028−47%

74▼17Keokuk County, IAIA9,7971,027−44%

75▲6Hancock County, IAIA10,5281,021−2%

76▼5Louisa County, IAIA10,4161,005−28%

77▲9Emmet County, IAIA9,107967−32%

78▲5Clarke County, IAIA9,574936−26%

79▼3Adair County, IAIA7,403936−4%

80▲5Fremont County, IAIA6,522894−24%

81▼8Montgomery County, IAIA10,002894−40%

82Sac County, IAIA9,525874−29%

83▼11Pocahontas County, IAIA6,819850−10%

84▲11Winnebago County, IAIA10,251834−8%

85▲7Wayne County, IAIA6,738821−8%

86▼2Van Buren County, IAIA7,131805−23%

87▲9Ida County, IAIA6,777796−27%

88▼1Decatur County, IAIA7,655793−39%

89▼9Davis County, IAIA9,230772−26%

90▼23Wright County, IAIA12,801771−65%

91▼14Howard County, IAIA9,415754−51%

92▼2Franklin County, IAIA9,868712−35%

93▼5Lyon County, IAIA12,354705−26%

94▼3Worth County, IAIA7,338627−33%

95▼1Taylor County, IAIA5,835564−44%

96▲1Adams County, IAIA3,617519−21%

97▼4Ringgold County, IAIA4,642478−47%

98▲1Audubon County, IAIA5,509447−31%

99▼1Osceola County, IAIA5,980344−31%

SHOWING 1–99 OF 99

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