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 2023 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.

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 POPULATIONVS 2000

01Polk County, IAIA516,54666,949–

02Linn County, IAIA232,02832,213–

03Scott County, IAIA175,25926,830–

04Johnson County, IAIA160,04422,790–

05Dubuque County, IAIA99,38119,172–

06Dallas County, IAIA118,45716,516–

07Black Hawk County, IAIA131,53214,868–

08Pottawattamie County, IAIA92,99611,706–

09Woodbury County, IAIA106,64911,560–

10Story County, IAIA101,29110,771–

11Warren County, IAIA57,3318,619–

12Clinton County, IAIA46,0027,575–

13Lee County, IAIA32,3065,328–

14Des Moines County, IAIA38,0774,857–

15Jasper County, IAIA38,1534,519–

16Cerro Gordo County, IAIA42,3724,498–

17Webster County, IAIA36,8384,254–

18Benton County, IAIA26,0044,061–

19Marion County, IAIA34,1923,862–

20Marshall County, IAIA39,8903,811–

21Muscatine County, IAIA41,8533,706–

22Wapello County, IAIA35,2103,505–

23Jones County, IAIA21,2533,432–

24Boone County, IAIA26,7993,346–

25Bremer County, IAIA25,2963,281–

26Buchanan County, IAIA20,8833,166–

27Plymouth County, IAIA25,6973,111–

28Jackson County, IAIA19,2882,965–

29Madison County, IAIA17,2702,784–

30Carroll County, IAIA20,3032,733–

31Fayette County, IAIA19,0472,732–

32Iowa County, IAIA16,5042,731–

33Washington County, IAIA22,6672,683–

34Cedar County, IAIA18,3592,628–

35Mahaska County, IAIA21,8802,585–

36Delaware County, IAIA17,6742,519–

37Winneshiek County, IAIA19,7332,450–

38Henry County, IAIA19,3492,348–

39Allamakee County, IAIA14,2382,131–

40Poweshiek County, IAIA18,3682,120–

41Dickinson County, IAIA18,0771,997–

42Clayton County, IAIA16,8451,967–

43Harrison County, IAIA14,6231,960–

44Palo Alto County, IAIA8,8991,887–

45Mills County, IAIA14,7931,882–

46Union County, IAIA11,8291,793–

47Floyd County, IAIA14,9011,782–

48Tama County, IAIA16,7961,743–

49Kossuth County, IAIA14,3221,700–

50Clay County, IAIA16,2021,668–

51Sioux County, IAIA36,7741,625–

52Page County, IAIA14,8561,619–

53Monroe County, IAIA7,4061,587–

54Cass County, IAIA12,9601,567–

55Appanoose County, IAIA12,0771,553–

56Guthrie County, IAIA10,7821,531–

57Butler County, IAIA14,0491,517–

58Jefferson County, IAIA15,2911,517–

59Hardin County, IAIA16,4551,515–

60Monona County, IAIA8,5391,392–

61Humboldt County, IAIA9,4091,328–

62Chickasaw County, IAIA11,6631,327–

63Lucas County, IAIA8,8471,298–

64Buena Vista County, IAIA20,4491,295–

65Cherokee County, IAIA11,3691,258–

66Calhoun County, IAIA9,5621,227–

67Shelby County, IAIA11,6891,217–

68Grundy County, IAIA12,3611,198–

69Greene County, IAIA8,6581,174–

70Mitchell County, IAIA10,6501,151–

71Hamilton County, IAIA14,9441,102–

72O'Brien County, IAIA14,2201,101–

73Crawford County, IAIA16,2371,028–

74Keokuk County, IAIA9,7971,027–

75Hancock County, IAIA10,5281,021–

76Louisa County, IAIA10,4161,005–

77Emmet County, IAIA9,107967–

78Clarke County, IAIA9,574936–

79Adair County, IAIA7,403936–

80Fremont County, IAIA6,522894–

81Montgomery County, IAIA10,002894–

82Sac County, IAIA9,525874–

83Pocahontas County, IAIA6,819850–

84Winnebago County, IAIA10,251834–

85Wayne County, IAIA6,738821–

86Van Buren County, IAIA7,131805–

87Ida County, IAIA6,777796–

88Decatur County, IAIA7,655793–

89Davis County, IAIA9,230772–

90Wright County, IAIA12,801771–

91Howard County, IAIA9,415754–

92Franklin County, IAIA9,868712–

93Lyon County, IAIA12,354705–

94Worth County, IAIA7,338627–

95Taylor County, IAIA5,835564–

96Adams County, IAIA3,617519–

97Ringgold County, IAIA4,642478–

98Audubon County, IAIA5,509447–

99Osceola County, IAIA5,980344–

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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