RANKING · 2020 CENSUS · 72 SHOWN OF 72

Highest Irish population share, Wisconsin counties · 2020

Wisconsin 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 72 counties in Wisconsin that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01Crawford County, WIWI15,91019.1%+2.6 pts

02Iowa County, WIWI23,95117.3%−1.5 pts

03Lafayette County, WIWI17,47815.5%−5.8 pts

04Richland County, WIWI17,03615.1%−2.2 pts

05Juneau County, WIWI26,64914.0%−1.3 pts

06Rock County, WIWI166,47214.0%−1.5 pts

07Florence County, WIWI4,74813.8%+2.0 pts

08La Crosse County, WIWI121,33913.8%−0.2 pts

09Pierce County, WIWI43,51913.7%−1.2 pts

10Walworth County, WIWI106,12713.6%−1.9 pts

11Marquette County, WIWI15,92713.5%−1.6 pts

12Waukesha County, WIWI417,21013.3%−1.5 pts

13Washburn County, WIWI17,08713.1%+1.6 pts

14Green County, WIWI37,22712.9%+1.3 pts

15Dane County, WIWI590,37512.7%−1.9 pts

16Sauk County, WIWI66,65212.6%−1.8 pts

17Grant County, WIWI52,44612.5%−4.0 pts

18Columbia County, WIWI58,13212.4%−3.2 pts

19Jefferson County, WIWI86,50512.2%+1.6 pts

20Oneida County, WIWI38,13112.1%−0.5 pts

21Forest County, WIWI9,57412.1%−1.5 pts

22Vilas County, WIWI23,76111.8%+0.3 pts

23St. Croix County, WIWI98,27611.8%−1.6 pts

24Adams County, WIWI21,75211.5%−1.6 pts

25Ozaukee County, WIWI94,34611.4%−2.0 pts

26Chippewa County, WIWI67,61411.3%−1.5 pts

27Vernon County, WIWI31,44311.3%−0.3 pts

28Kenosha County, WIWI168,44811.2%−1.9 pts

29Washington County, WIWI139,23811.2%−0.5 pts

30Fond du Lac County, WIWI104,66911.1%−1.3 pts

31Monroe County, WIWI46,57210.9%−1.5 pts

32Eau Claire County, WIWI109,03310.9%−0.5 pts

33Dunn County, WIWI46,22310.8%+0.2 pts

34Polk County, WIWI45,80310.6%+0.4 pts

35Douglas County, WIWI43,99010.5%−1.4 pts

36Iron County, WIWI6,12710.4%+0.7 pts

37Winnebago County, WIWI174,21810.4%−0.1 pts

38Jackson County, WIWI20,99910.3%−0.2 pts

39Dodge County, WIWI89,09710.2%−0.7 pts

40Racine County, WIWI198,91910.2%+0.5 pts

41Sawyer County, WIWI18,84610.0%−0.9 pts

42Rusk County, WIWI14,1469.8%−0.5 pts

43Waupaca County, WIWI51,4619.8%−1.9 pts

44Brown County, WIWI275,8039.8%−0.7 pts

45Outagamie County, WIWI195,8949.7%−2.5 pts

46Door County, WIWI30,6169.6%−1.0 pts

47Price County, WIWI13,9889.5%+1.5 pts

48Bayfield County, WIWI16,7879.4%+0.3 pts

49Burnett County, WIWI17,2239.4%−3.0 pts

50Green Lake County, WIWI19,3059.3%+0.6 pts

51Portage County, WIWI71,9439.3%−2.3 pts

52Barron County, WIWI46,4849.2%−1.2 pts

53Langlade County, WIWI19,5349.1%−4.7 pts

54Lincoln County, WIWI28,4039.0%−0.4 pts

55Oconto County, WIWI40,1958.9%−0.4 pts

56Marinette County, WIWI42,5748.9%−1.3 pts

57Wood County, WIWI74,0608.8%−2.4 pts

58Sheboygan County, WIWI118,0478.7%−0.2 pts

59Waushara County, WIWI25,2238.7%−3.1 pts

60Calumet County, WIWI53,9828.7%−0.8 pts

61Manitowoc County, WIWI81,7108.6%−0.6 pts

62Ashland County, WIWI16,2038.2%−2.6 pts

63Pepin County, WIWI7,5138.1%−1.6 pts

64Milwaukee County, WIWI924,2167.9%−1.2 pts

65Trempealeau County, WIWI31,1717.7%−1.5 pts

66Marathon County, WIWI139,4327.6%−0.3 pts

67Kewaunee County, WIWI20,7586.9%+0.7 pts

68Buffalo County, WIWI13,3186.9%−0.2 pts

69Shawano County, WIWI41,5606.7%−0.9 pts

70Clark County, WIWI35,0526.6%−1.0 pts

71Taylor County, WIWI20,1186.5%−1.8 pts

72Menominee County, WIWI4,1990.7%−1.7 pts

SHOWING 1–72 OF 72

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS