RANKING · 2024 ACS · 102 SHOWN OF 102

Largest Irish population, Illinois counties

Illinois 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 102 counties in Illinois that qualify, ranked against each other statewide.

Irish Americans: full group profile →

IllinoisAll 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 2010

01Cook County, ILIL5,194,625432,999−17%

02DuPage County, ILIL934,298121,296−20%

03Will County, ILIL712,25390,437−27%

04Lake County, ILIL719,33971,697−20%

05Kane County, ILIL525,75755,202−16%

06McHenry County, ILIL317,75149,359−14%

07Madison County, ILIL263,11035,256−12%

08Winnebago County, ILIL283,67433,521−16%

09McLean County, ILIL171,41924,673−4%

10St. Clair County, ILIL250,70824,556−17%

11Sangamon County, ILIL194,17024,126−17%

12Peoria County, ILIL178,55321,667−21%

13Champaign County, ILIL209,97218,768−22%

14LaSalle County, ILIL107,77317,477−19%

15Tazewell County, ILIL130,04916,978−12%

16Kendall County, ILIL145,47016,387−3%

17DeKalb County, ILIL101,83515,331−16%

18Rock Island County, ILIL141,86915,197−28%

19Kankakee County, ILIL105,52512,000−25%

20Macon County, ILIL99,30010,585−26%

21Williamson County, ILIL67,2259,099−20%

22Grundy County, ILIL54,0527,651−32%

23Whiteside County, ILIL54,1217,530−17%

24Ogle County, ILIL51,3997,050−14%

25Knox County, ILIL47,7676,743−14%

26Boone County, ILIL53,5686,733−8%

27Coles County, ILIL46,6076,647−24%

28Adams County, ILIL64,2676,457−26%

29Macoupin County, ILIL43,7486,003−23%

30Henry County, ILIL48,0955,936−19%

31Vermilion County, ILIL71,2595,770−30%

32Stephenson County, ILIL43,2205,688−5%

33Jackson County, ILIL52,5015,467−37%

34Lee County, ILIL32,9145,192−23%

35Livingston County, ILIL35,0575,063−25%

36Monroe County, ILIL34,8404,618−13%

37Marion County, ILIL36,3824,552−27%

38Bureau County, ILIL32,5104,455−8%

39Woodford County, ILIL38,1114,426−18%

40Franklin County, ILIL36,9164,416−40%

41Morgan County, ILIL32,5154,220−23%

42Jo Daviess County, ILIL21,5944,102−8%

43Saline County, ILIL22,7723,994−11%

44Jefferson County, ILIL36,1473,883−37%

45Logan County, ILIL27,1823,615−9%

46Montgomery County, ILIL28,0763,601+7%

47Christian County, ILIL33,4433,579−20%

48Iroquois County, ILIL26,1503,526−17%

49Fulton County, ILIL32,9013,500−29%

50Randolph County, ILIL29,9213,389−11%

51McDonough County, ILIL25,9163,276−27%

52Effingham County, ILIL34,5192,949−14%

53Jersey County, ILIL21,1602,813−16%

54Clinton County, ILIL37,1282,412−34%

55Piatt County, ILIL16,7912,305+3%

56Edgar County, ILIL16,3232,252−21%

57Hancock County, ILIL16,8032,171−7%

58Bond County, ILIL16,9592,164+19%

59Warren County, ILIL16,2222,119−19%

60Fayette County, ILIL20,7902,104+3%

61Perry County, ILIL20,1602,102−35%

62Clark County, ILIL15,1142,010−15%

63Carroll County, ILIL15,4192,003−8%

64Mercer County, ILIL15,2291,889−37%

65Shelby County, ILIL20,5761,870−5%

66White County, ILIL13,2501,866−20%

67Marshall County, ILIL11,4731,794−16%

68Massac County, ILIL13,5021,792−28%

69Washington County, ILIL13,5641,771−9%

70Crawford County, ILIL18,6481,762−28%

71De Witt County, ILIL15,1181,732−16%

72Clay County, ILIL12,7931,702−3%

73Richland County, ILIL15,2191,687+13%

74Ford County, ILIL13,2161,586−28%

75Mason County, ILIL12,4111,557+2%

76Moultrie County, ILIL14,3711,555−12%

77Wayne County, ILIL15,8821,496−10%

78Union County, ILIL16,6561,482−34%

79Pike County, ILIL14,2311,477−34%

80Douglas County, ILIL19,8801,468−31%

81Greene County, ILIL11,3131,434−30%

82Johnson County, ILIL13,3631,396−5%

83Lawrence County, ILIL13,7901,364−15%

84Menard County, ILIL11,8631,330−33%

85Wabash County, ILIL10,9071,283+26%

86Cumberland County, ILIL10,2081,139−12%

87Cass County, ILIL12,4631,086−25%

88Hamilton County, ILIL7,8591,080−38%

89Jasper County, ILIL9,0321,016−5%

90Schuyler County, ILIL6,657934+4%

91Gallatin County, ILIL4,616886−33%

92Henderson County, ILIL5,984854−21%

93Putnam County, ILIL5,619719−28%

94Scott County, ILIL4,866702−19%

95Stark County, ILIL5,319670−29%

96Brown County, ILIL6,401558−36%

97Pope County, ILIL3,672549−35%

98Edwards County, ILIL5,898496−12%

99Pulaski County, ILIL4,820461+9%

100Hardin County, ILIL3,588449−61%

101Calhoun County, ILIL4,300375−41%

102Alexander County, ILIL4,570339−41%

SHOWING 1–102 OF 102

Download CSV (full list, 102 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES