RANKING · 2010 CENSUS · 102 SHOWN OF 102

Highest Irish population share, Illinois counties · 2010

Illinois counties ranked by the share of all residents who are Irish ancestry (2010 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 14.2%.

Irish Americans: full group profile →

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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 SHAREVS –

01Hardin County, ILIL3,58826.5%–

02Grundy County, ILIL54,05223.0%–

03Gallatin County, ILIL4,61622.9%–

04Hamilton County, ILIL7,85920.7%–

05Jo Daviess County, ILIL21,59419.7%–

06Pope County, ILIL3,67219.1%–

07LaSalle County, ILIL107,77319.0%–

08Lee County, ILIL32,91418.8%–

09McHenry County, ILIL317,75118.7%–

10Franklin County, ILIL36,91618.7%–

11Will County, ILIL712,25318.6%–

12Mercer County, ILIL15,22918.2%–

13Saline County, ILIL22,77217.8%–

14DeKalb County, ILIL101,83517.5%–

15Williamson County, ILIL67,22517.3%–

16Livingston County, ILIL35,05717.2%–

17Putnam County, ILIL5,61916.7%–

18Marshall County, ILIL11,47316.7%–

19DuPage County, ILIL934,29816.5%–

20Monroe County, ILIL34,84016.5%–

21Coles County, ILIL46,60716.4%–

22Macoupin County, ILIL43,74816.2%–

23Scott County, ILIL4,86616.2%–

24Massac County, ILIL13,50216.1%–

25Kendall County, ILIL145,47016.0%–

26White County, ILIL13,25015.8%–

27Jefferson County, ILIL36,14715.8%–

28Marion County, ILIL36,38215.8%–

29Menard County, ILIL11,86315.6%–

30Ford County, ILIL13,21615.5%–

31Whiteside County, ILIL54,12115.5%–

32Stark County, ILIL5,31915.5%–

33McLean County, ILIL171,41915.4%–

34Morgan County, ILIL32,51515.4%–

35Edgar County, ILIL16,32315.3%–

36Ogle County, ILIL51,39915.3%–

37Madison County, ILIL263,11014.9%–

38Knox County, ILIL47,76714.9%–

39Sangamon County, ILIL194,17014.8%–

40Peoria County, ILIL178,55314.8%–

41Greene County, ILIL11,31314.7%–

42Warren County, ILIL16,22214.7%–

43Jersey County, ILIL21,16014.7%–

44Henry County, ILIL48,09514.6%–

45Jackson County, ILIL52,50114.5%–

46Henderson County, ILIL5,98414.5%–

47Tazewell County, ILIL130,04914.4%–

48Perry County, ILIL20,16014.3%–

49Rock Island County, ILIL141,86914.2%–

50Clark County, ILIL15,11414.2%–

51Kankakee County, ILIL105,52514.2%–

52Woodford County, ILIL38,11114.1%–

53Iroquois County, ILIL26,15014.1%–

54Carroll County, ILIL15,41914.0%–

55Bureau County, ILIL32,51013.8%–

56Boone County, ILIL53,56813.7%–

57McDonough County, ILIL25,91613.7%–

58Winnebago County, ILIL283,67413.5%–

59Pike County, ILIL14,23113.4%–

60Piatt County, ILIL16,79113.4%–

61Fulton County, ILIL32,90113.2%–

62Logan County, ILIL27,18213.1%–

63Washington County, ILIL13,56413.1%–

64Adams County, ILIL64,26713.1%–

65Kane County, ILIL525,75713.0%–

66Macon County, ILIL99,30012.9%–

67Lake County, ILIL719,33912.9%–

68Christian County, ILIL33,44312.7%–

69Brown County, ILIL6,40112.7%–

70Union County, ILIL16,65612.6%–

71Clay County, ILIL12,79312.6%–

72Stephenson County, ILIL43,22012.5%–

73Calhoun County, ILIL4,30012.4%–

74Crawford County, ILIL18,64812.4%–

75De Witt County, ILIL15,11812.3%–

76Champaign County, ILIL209,97212.2%–

77Hancock County, ILIL16,80312.1%–

78Moultrie County, ILIL14,37112.0%–

79Schuyler County, ILIL6,65712.0%–

80Cumberland County, ILIL10,20811.7%–

81Johnson County, ILIL13,36311.5%–

82Randolph County, ILIL29,92111.3%–

83Montgomery County, ILIL28,07611.2%–

84St. Clair County, ILIL250,70811.1%–

85Jasper County, ILIL9,03211.0%–

86Douglas County, ILIL19,88010.7%–

87Cass County, ILIL12,46310.6%–

88Mason County, ILIL12,41110.3%–

89Bond County, ILIL16,95910.1%–

90Cook County, ILIL5,194,62510.1%–

91Vermilion County, ILIL71,25910.1%–

92Effingham County, ILIL34,51910.0%–

93Wayne County, ILIL15,8829.8%–

94Clinton County, ILIL37,1289.8%–

95Lawrence County, ILIL13,7909.5%–

96Fayette County, ILIL20,7909.3%–

97Richland County, ILIL15,2199.2%–

98Shelby County, ILIL20,5768.8%–

99Edwards County, ILIL5,8988.4%–

100Wabash County, ILIL10,9078.4%–

101Alexander County, ILIL4,5706.8%–

102Pulaski County, ILIL4,8206.8%–

SHOWING 1–102 OF 102

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