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. The median across all 102 is 3,276. Biggest climber in the top 100 since 2020: Hancock County, IL, up 16 places to #57.

Irish Americans: full group profile →

IllinoisAll states All rankings

SAME RANKING BYCities States Metros

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%

10▲1St. Clair County, ILIL250,70824,556−17%

11▼1Sangamon County, ILIL194,17024,126−17%

12▲1Peoria County, ILIL178,55321,667−21%

13▼1Champaign County, ILIL209,97218,768−22%

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

15▲2Tazewell County, ILIL130,04916,978−12%

16▼1Kendall County, ILIL145,47016,387−3%

17▲1DeKalb County, ILIL101,83515,331−16%

18▼2Rock Island County, ILIL141,86915,197−28%

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

20Macon County, ILIL99,30010,585−26%

21▲1Williamson County, ILIL67,2259,099−20%

22▼1Grundy County, ILIL54,0527,651−32%

23▲3Whiteside County, ILIL54,1217,530−17%

24▲3Ogle County, ILIL51,3997,050−14%

25▼1Knox County, ILIL47,7676,743−14%

26▲5Boone County, ILIL53,5686,733−8%

27▲1Coles County, ILIL46,6076,647−24%

28▼3Adams County, ILIL64,2676,457−26%

29▲5Macoupin County, ILIL43,7486,003−23%

30▼1Henry County, ILIL48,0955,936−19%

31▼8Vermilion County, ILIL71,2595,770−30%

32▲4Stephenson County, ILIL43,2205,688−5%

33▼1Jackson County, ILIL52,5015,467−37%

34▼1Lee County, ILIL32,9145,192−23%

35▼5Livingston County, ILIL35,0575,063−25%

36▲7Monroe County, ILIL34,8404,618−13%

37Marion County, ILIL36,3824,552−27%

38▲3Bureau County, ILIL32,5104,455−8%

39▼1Woodford County, ILIL38,1114,426−18%

40▼5Franklin County, ILIL36,9164,416−40%

41▲3Morgan County, ILIL32,5154,220−23%

42▲4Jo Daviess County, ILIL21,5944,102−8%

43▲4Saline County, ILIL22,7723,994−11%

44▼5Jefferson County, ILIL36,1473,883−37%

45▼5Logan County, ILIL27,1823,615−9%

46▲5Montgomery County, ILIL28,0763,601+7%

47▲3Christian County, ILIL33,4433,579−20%

48▼6Iroquois County, ILIL26,1503,526−17%

49▼4Fulton County, ILIL32,9013,500−29%

50▲3Randolph County, ILIL29,9213,389−11%

51▼3McDonough County, ILIL25,9163,276−27%

52▼3Effingham County, ILIL34,5192,949−14%

53▲1Jersey County, ILIL21,1602,813−16%

54▼2Clinton County, ILIL37,1282,412−34%

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

56Edgar County, ILIL16,3232,252−21%

57▲16Hancock County, ILIL16,8032,171−7%

58▼1Bond County, ILIL16,9592,164+19%

59Warren County, ILIL16,2222,119−19%

60▲8Fayette County, ILIL20,7902,104+3%

61▲14Perry County, ILIL20,1602,102−35%

62▼1Clark County, ILIL15,1142,010−15%

63▲4Carroll County, ILIL15,4192,003−8%

64▲5Mercer County, ILIL15,2291,889−37%

65▲14Shelby County, ILIL20,5761,870−5%

66▼2White County, ILIL13,2501,866−20%

67▼1Marshall County, ILIL11,4731,794−16%

68▲6Massac County, ILIL13,5021,792−28%

69▲12Washington County, ILIL13,5641,771−9%

70▼12Crawford County, ILIL18,6481,762−28%

71▼11De Witt County, ILIL15,1181,732−16%

72▲4Clay County, ILIL12,7931,702−3%

73▼8Richland County, ILIL15,2191,687+13%

74▼3Ford County, ILIL13,2161,586−28%

75▼12Mason County, ILIL12,4111,557+2%

76▲7Moultrie County, ILIL14,3711,555−12%

77▼5Wayne County, ILIL15,8821,496−10%

78▼1Union County, ILIL16,6561,482−34%

79▲3Pike County, ILIL14,2311,477−34%

80▼18Douglas County, ILIL19,8801,468−31%

81▼1Greene County, ILIL11,3131,434−30%

82▲5Johnson County, ILIL13,3631,396−5%

83▼5Lawrence County, ILIL13,7901,364−15%

84▼14Menard County, ILIL11,8631,330−33%

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

86▲2Cumberland County, ILIL10,2081,139−12%

87▼3Cass County, ILIL12,4631,086−25%

88▼2Hamilton County, ILIL7,8591,080−38%

89▲1Jasper County, ILIL9,0321,016−5%

90▲2Schuyler County, ILIL6,657934+4%

91▼2Gallatin County, ILIL4,616886−33%

92▲1Henderson County, ILIL5,984854−21%

93▲1Putnam County, ILIL5,619719−28%

94▲3Scott County, ILIL4,866702−19%

95▼4Stark County, ILIL5,319670−29%

96▼1Brown County, ILIL6,401558−36%

97▲2Pope County, ILIL3,672549−35%

98▼2Edwards County, ILIL5,898496−12%

99▲1Pulaski County, ILIL4,820461+9%

100▼2Hardin 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 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES