RANKING · 2020 CENSUS · 102 SHOWN OF 102

Highest Irish population share, Illinois counties · 2020

Illinois 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 102 counties in Illinois that qualify, ranked against each other statewide. The median across all 102 is 11.7%.

Irish Americans: full group profile →

IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01Gallatin County, ILIL4,61619.0%−4.0 pts

02Grundy County, ILIL54,05218.1%−4.8 pts

03LaSalle County, ILIL107,77318.0%−1.0 pts

04Livingston County, ILIL35,05717.5%+0.3 pts

05Jo Daviess County, ILIL21,59417.2%−2.4 pts

06McHenry County, ILIL317,75116.7%−2.1 pts

07Marshall County, ILIL11,47316.0%−0.7 pts

08Stark County, ILIL5,31915.6%+0.1 pts

09Lee County, ILIL32,91415.4%−3.3 pts

10Piatt County, ILIL16,79115.3%+1.9 pts

11Saline County, ILIL22,77214.9%−2.9 pts

12Iroquois County, ILIL26,15014.9%+0.8 pts

13Mason County, ILIL12,41114.9%+4.6 pts

14Knox County, ILIL47,76714.9%0.0 pts

15DeKalb County, ILIL101,83514.8%−2.7 pts

16Logan County, ILIL27,18214.7%+1.6 pts

17McLean County, ILIL171,41914.7%−0.7 pts

18Will County, ILIL712,25314.7%−3.9 pts

19White County, ILIL13,25014.5%−1.3 pts

20Edgar County, ILIL16,32314.4%−0.9 pts

21Menard County, ILIL11,86314.3%−1.3 pts

22Kendall County, ILIL145,47014.3%−1.7 pts

23DuPage County, ILIL934,29814.0%−2.5 pts

24Ogle County, ILIL51,39913.9%−1.4 pts

25Hardin County, ILIL3,58813.9%−12.6 pts

26De Witt County, ILIL15,11813.5%+1.2 pts

27Bond County, ILIL16,95913.4%+3.3 pts

28Ford County, ILIL13,21613.2%−2.4 pts

29Henry County, ILIL48,09513.1%−1.5 pts

30Hamilton County, ILIL7,85913.0%−7.7 pts

31Clark County, ILIL15,11413.0%−1.3 pts

32Madison County, ILIL263,11012.9%−2.0 pts

33Warren County, ILIL16,22212.9%−1.8 pts

34Jersey County, ILIL21,16012.8%−1.8 pts

35Coles County, ILIL46,60712.8%−3.5 pts

36Bureau County, ILIL32,51012.8%−1.0 pts

37Whiteside County, ILIL54,12112.7%−2.8 pts

38Kankakee County, ILIL105,52512.7%−1.5 pts

39Carroll County, ILIL15,41912.6%−1.4 pts

40Sangamon County, ILIL194,17012.5%−2.3 pts

41Franklin County, ILIL36,91612.4%−6.3 pts

42Macon County, ILIL99,30012.4%−0.5 pts

43Williamson County, ILIL67,22512.3%−4.9 pts

44Rock Island County, ILIL141,86912.3%−1.9 pts

45Marion County, ILIL36,38212.2%−3.6 pts

46Tazewell County, ILIL130,04912.2%−2.2 pts

47Schuyler County, ILIL6,65712.2%+0.2 pts

48Richland County, ILIL15,21912.0%+2.8 pts

49Peoria County, ILIL178,55312.0%−2.8 pts

50Winnebago County, ILIL283,67411.8%−1.7 pts

51McDonough County, ILIL25,91611.7%−2.0 pts

52Crawford County, ILIL18,64811.7%−0.7 pts

53Boone County, ILIL53,56811.7%−2.0 pts

54Monroe County, ILIL34,84011.6%−4.8 pts

55Henderson County, ILIL5,98411.6%−2.8 pts

56Macoupin County, ILIL43,74811.6%−4.7 pts

57Jefferson County, ILIL36,14711.5%−4.3 pts

58Clay County, ILIL12,79311.5%−1.1 pts

59Woodford County, ILIL38,11111.4%−2.7 pts

60Mercer County, ILIL15,22911.4%−6.8 pts

61Scott County, ILIL4,86611.4%−4.8 pts

62Morgan County, ILIL32,51511.4%−4.0 pts

63Putnam County, ILIL5,61911.3%−5.4 pts

64Massac County, ILIL13,50211.3%−4.9 pts

65Kane County, ILIL525,75711.2%−1.8 pts

66Adams County, ILIL64,26711.1%−1.9 pts

67Fulton County, ILIL32,90111.0%−2.1 pts

68Wabash County, ILIL10,90710.9%+2.5 pts

69Jackson County, ILIL52,50110.7%−3.8 pts

70Lake County, ILIL719,33910.6%−2.3 pts

71Champaign County, ILIL209,97210.6%−1.6 pts

72Wayne County, ILIL15,88210.5%+0.6 pts

73Greene County, ILIL11,31310.4%−4.4 pts

74Douglas County, ILIL19,88010.3%−0.3 pts

75Stephenson County, ILIL43,22010.3%−2.2 pts

76Montgomery County, ILIL28,07610.3%−0.9 pts

77Cass County, ILIL12,46310.0%−0.6 pts

78Effingham County, ILIL34,51910.0%0.0 pts

79Jasper County, ILIL9,0329.9%−1.1 pts

80Vermilion County, ILIL71,2599.8%−0.3 pts

81Pope County, ILIL3,6729.8%−9.3 pts

82Christian County, ILIL33,4439.8%−3.0 pts

83Cumberland County, ILIL10,2089.6%−2.2 pts

84Washington County, ILIL13,5649.5%−3.6 pts

85Hancock County, ILIL16,8039.3%−2.8 pts

86Brown County, ILIL6,4019.3%−3.5 pts

87Lawrence County, ILIL13,7909.1%−0.3 pts

88St. Clair County, ILIL250,7089.1%−2.0 pts

89Edwards County, ILIL5,8989.1%+0.7 pts

90Moultrie County, ILIL14,3719.0%−3.0 pts

91Randolph County, ILIL29,9218.9%−2.4 pts

92Union County, ILIL16,6568.8%−3.7 pts

93Cook County, ILIL5,194,6258.7%−1.4 pts

94Pike County, ILIL14,2318.4%−5.0 pts

95Johnson County, ILIL13,3638.4%−3.2 pts

96Fayette County, ILIL20,7908.3%−1.0 pts

97Clinton County, ILIL37,1287.7%−2.1 pts

98Perry County, ILIL20,1607.5%−6.9 pts

99Calhoun County, ILIL4,3007.1%−5.4 pts

100Pulaski County, ILIL4,8206.9%+0.1 pts

101Shelby County, ILIL20,5766.2%−2.5 pts

102Alexander County, ILIL4,5705.5%−1.3 pts

SHOWING 1–102 OF 102

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