RANKING · 2010 CENSUS · 99 SHOWN OF 99

Largest Irish population, Iowa counties · 2010

Iowa counties ranked by the number of residents who are Irish ancestry, from the 2010 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 2,157.

Irish Americans: full group profile →

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 –

01Polk County, IAIA516,54664,297–

02Linn County, IAIA232,02837,897–

03Scott County, IAIA175,25926,518–

04Johnson County, IAIA160,04422,404–

05Dubuque County, IAIA99,38121,538–

06Black Hawk County, IAIA131,53217,943–

07Pottawattamie County, IAIA92,99616,746–

08Woodbury County, IAIA106,64915,917–

09Story County, IAIA101,29111,105–

10Dallas County, IAIA118,4579,819–

11Clinton County, IAIA46,0028,881–

12Warren County, IAIA57,3317,414–

13Des Moines County, IAIA38,0776,736–

14Webster County, IAIA36,8386,599–

15Wapello County, IAIA35,2106,223–

16Cerro Gordo County, IAIA42,3725,894–

17Lee County, IAIA32,3065,826–

18Muscatine County, IAIA41,8535,594–

19Marshall County, IAIA39,8905,374–

20Jasper County, IAIA38,1535,279–

21Marion County, IAIA34,1924,705–

22Benton County, IAIA26,0044,366–

23Buchanan County, IAIA20,8834,081–

24Jones County, IAIA21,2533,798–

25Boone County, IAIA26,7993,443–

26Washington County, IAIA22,6673,296–

27Henry County, IAIA19,3493,236–

28Jackson County, IAIA19,2883,233–

29Winneshiek County, IAIA19,7333,203–

30Plymouth County, IAIA25,6973,198–

31Mahaska County, IAIA21,8803,162–

32Delaware County, IAIA17,6743,102–

33Madison County, IAIA17,2703,071–

34Fayette County, IAIA19,0473,060–

35Poweshiek County, IAIA18,3682,996–

36Iowa County, IAIA16,5042,933–

37Harrison County, IAIA14,6232,911–

38Bremer County, IAIA25,2962,848–

39Page County, IAIA14,8562,694–

40Allamakee County, IAIA14,2382,682–

41Cedar County, IAIA18,3592,581–

42Carroll County, IAIA20,3032,524–

43Clayton County, IAIA16,8452,384–

44Mills County, IAIA14,7932,357–

45Kossuth County, IAIA14,3222,298–

46Sioux County, IAIA36,7742,204–

47Wright County, IAIA12,8012,195–

48Jefferson County, IAIA15,2912,183–

49Clay County, IAIA16,2022,158–

50Dickinson County, IAIA18,0772,157–

51Hamilton County, IAIA14,9442,125–

52Buena Vista County, IAIA20,4492,112–

53Union County, IAIA11,8292,053–

54Appanoose County, IAIA12,0772,041–

55Tama County, IAIA16,7961,992–

56Hardin County, IAIA16,4551,944–

57Cass County, IAIA12,9601,929–

58Crawford County, IAIA16,2371,928–

59Grundy County, IAIA12,3611,874–

60Keokuk County, IAIA9,7971,824–

61Cherokee County, IAIA11,3691,725–

62Floyd County, IAIA14,9011,725–

63Palo Alto County, IAIA8,8991,717–

64Butler County, IAIA14,0491,691–

65Monroe County, IAIA7,4061,638–

66Monona County, IAIA8,5391,618–

67Chickasaw County, IAIA11,6631,574–

68Greene County, IAIA8,6581,555–

69Howard County, IAIA9,4151,543–

70Shelby County, IAIA11,6891,534–

71Lucas County, IAIA8,8471,509–

72Montgomery County, IAIA10,0021,484–

73Guthrie County, IAIA10,7821,468–

74Emmet County, IAIA9,1071,428–

75Louisa County, IAIA10,4161,400–

76Calhoun County, IAIA9,5621,352–

77Mitchell County, IAIA10,6501,332–

78Decatur County, IAIA7,6551,308–

79Clarke County, IAIA9,5741,260–

80Sac County, IAIA9,5251,233–

81Fremont County, IAIA6,5221,182–

82Humboldt County, IAIA9,4091,095–

83Ida County, IAIA6,7771,092–

84Franklin County, IAIA9,8681,089–

85Davis County, IAIA9,2301,050–

86Van Buren County, IAIA7,1311,050–

87Hancock County, IAIA10,5281,043–

88O'Brien County, IAIA14,2201,032–

89Taylor County, IAIA5,8351,016–

90Adair County, IAIA7,403979–

91Lyon County, IAIA12,354951–

92Pocahontas County, IAIA6,819946–

93Worth County, IAIA7,338932–

94Winnebago County, IAIA10,251902–

95Ringgold County, IAIA4,642895–

96Wayne County, IAIA6,738889–

97Adams County, IAIA3,617656–

98Audubon County, IAIA5,509646–

99Osceola County, IAIA5,980496–

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

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