RANKING · 2020 CENSUS · 72 SHOWN OF 72

Largest Irish population, Wisconsin counties · 2020

Wisconsin counties ranked by the number of residents who are Irish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 72 counties in Wisconsin that qualify, ranked against each other statewide. The median across all 72 is 4,278.

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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 2010

01Milwaukee County, WIWI924,21675,130−12%

02Dane County, WIWI590,37568,833−1%

03Waukesha County, WIWI417,21053,380−6%

04Brown County, WIWI275,80325,6320%

05Rock County, WIWI166,47222,735−8%

06Racine County, WIWI198,91920,056+6%

07Kenosha County, WIWI168,44818,959−12%

08Outagamie County, WIWI195,89418,033−15%

09Winnebago County, WIWI174,21817,776+2%

10La Crosse County, WIWI121,33916,265+4%

11Washington County, WIWI139,23815,1490%

12Walworth County, WIWI106,12714,043−11%

13Eau Claire County, WIWI109,03311,355+2%

14Fond du Lac County, WIWI104,66911,346−9%

15St. Croix County, WIWI98,27610,540−5%

16Jefferson County, WIWI86,50510,348+18%

17Marathon County, WIWI139,43210,316−2%

18Ozaukee County, WIWI94,34610,160−12%

19Sheboygan County, WIWI118,04710,051−3%

20Dodge County, WIWI89,0978,975−7%

21Sauk County, WIWI66,6528,090−8%

22Chippewa County, WIWI67,6147,251−8%

23Columbia County, WIWI58,1327,086−19%

24Manitowoc County, WIWI81,7106,766−10%

25Portage County, WIWI71,9436,599−18%

26Grant County, WIWI52,4466,443−23%

27Wood County, WIWI74,0606,398−23%

28Pierce County, WIWI43,5195,796−4%

29Monroe County, WIWI46,5725,034−8%

30Waupaca County, WIWI51,4614,982−19%

31Dunn County, WIWI46,2234,846+6%

32Green County, WIWI37,2274,736+13%

33Polk County, WIWI45,8034,611+2%

34Douglas County, WIWI43,9904,555−12%

35Calumet County, WIWI53,9824,329−4%

36Oneida County, WIWI38,1314,278−7%

37Barron County, WIWI46,4844,154−13%

38Iowa County, WIWI23,9514,100−8%

39Juneau County, WIWI26,6493,730−9%

40Marinette County, WIWI42,5743,583−17%

41Vernon County, WIWI31,4433,462+2%

42Oconto County, WIWI40,1953,368−4%

43Crawford County, WIWI15,9103,093+11%

44Shawano County, WIWI41,5602,725−14%

45Door County, WIWI30,6162,643−11%

46Richland County, WIWI17,0362,632−17%

47Vilas County, WIWI23,7612,592+4%

48Lafayette County, WIWI17,4782,582−28%

49Lincoln County, WIWI28,4032,501−9%

50Adams County, WIWI21,7522,314−16%

51Clark County, WIWI35,0522,304−13%

52Trempealeau County, WIWI31,1712,262−13%

53Jackson County, WIWI20,9992,116−1%

54Waushara County, WIWI25,2232,100−28%

55Marquette County, WIWI15,9272,072−11%

56Washburn County, WIWI17,0872,060+12%

57Green Lake County, WIWI19,3051,755+5%

58Langlade County, WIWI19,5341,749−37%

59Sawyer County, WIWI18,8461,649−9%

60Burnett County, WIWI17,2231,442−26%

61Bayfield County, WIWI16,7871,419+3%

62Kewaunee County, WIWI20,7581,401+10%

63Rusk County, WIWI14,1461,386−10%

64Taylor County, WIWI20,1181,326−23%

65Price County, WIWI13,9881,270+10%

66Ashland County, WIWI16,2031,266−28%

67Forest County, WIWI9,5741,085−16%

68Buffalo County, WIWI13,318898−7%

69Florence County, WIWI4,748597+10%

70Iron County, WIWI6,127592+1%

71Pepin County, WIWI7,513589−19%

72Menominee County, WIWI4,19931−69%

SHOWING 1–72 OF 72

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