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 (2023 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.

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 SHAREVS 2000

01Gallatin County, ILIL4,61619.0%–

02Grundy County, ILIL54,05218.1%–

03LaSalle County, ILIL107,77318.0%–

04Livingston County, ILIL35,05717.5%–

05Jo Daviess County, ILIL21,59417.2%–

06McHenry County, ILIL317,75116.7%–

07Marshall County, ILIL11,47316.0%–

08Stark County, ILIL5,31915.6%–

09Lee County, ILIL32,91415.4%–

10Piatt County, ILIL16,79115.3%–

11Saline County, ILIL22,77214.9%–

12Iroquois County, ILIL26,15014.9%–

13Mason County, ILIL12,41114.9%–

14Knox County, ILIL47,76714.9%–

15DeKalb County, ILIL101,83514.8%–

16Logan County, ILIL27,18214.7%–

17McLean County, ILIL171,41914.7%–

18Will County, ILIL712,25314.7%–

19White County, ILIL13,25014.5%–

20Edgar County, ILIL16,32314.4%–

21Menard County, ILIL11,86314.3%–

22Kendall County, ILIL145,47014.3%–

23DuPage County, ILIL934,29814.0%–

24Ogle County, ILIL51,39913.9%–

25Hardin County, ILIL3,58813.9%–

26De Witt County, ILIL15,11813.5%–

27Bond County, ILIL16,95913.4%–

28Ford County, ILIL13,21613.2%–

29Henry County, ILIL48,09513.1%–

30Hamilton County, ILIL7,85913.0%–

31Clark County, ILIL15,11413.0%–

32Madison County, ILIL263,11012.9%–

33Warren County, ILIL16,22212.9%–

34Jersey County, ILIL21,16012.8%–

35Coles County, ILIL46,60712.8%–

36Bureau County, ILIL32,51012.8%–

37Whiteside County, ILIL54,12112.7%–

38Kankakee County, ILIL105,52512.7%–

39Carroll County, ILIL15,41912.6%–

40Sangamon County, ILIL194,17012.5%–

41Franklin County, ILIL36,91612.4%–

42Macon County, ILIL99,30012.4%–

43Williamson County, ILIL67,22512.3%–

44Rock Island County, ILIL141,86912.3%–

45Marion County, ILIL36,38212.2%–

46Tazewell County, ILIL130,04912.2%–

47Schuyler County, ILIL6,65712.2%–

48Richland County, ILIL15,21912.0%–

49Peoria County, ILIL178,55312.0%–

50Winnebago County, ILIL283,67411.8%–

51McDonough County, ILIL25,91611.7%–

52Crawford County, ILIL18,64811.7%–

53Boone County, ILIL53,56811.7%–

54Monroe County, ILIL34,84011.6%–

55Henderson County, ILIL5,98411.6%–

56Macoupin County, ILIL43,74811.6%–

57Jefferson County, ILIL36,14711.5%–

58Clay County, ILIL12,79311.5%–

59Woodford County, ILIL38,11111.4%–

60Mercer County, ILIL15,22911.4%–

61Scott County, ILIL4,86611.4%–

62Morgan County, ILIL32,51511.4%–

63Putnam County, ILIL5,61911.3%–

64Massac County, ILIL13,50211.3%–

65Kane County, ILIL525,75711.2%–

66Adams County, ILIL64,26711.1%–

67Fulton County, ILIL32,90111.0%–

68Wabash County, ILIL10,90710.9%–

69Jackson County, ILIL52,50110.7%–

70Lake County, ILIL719,33910.6%–

71Champaign County, ILIL209,97210.6%–

72Wayne County, ILIL15,88210.5%–

73Greene County, ILIL11,31310.4%–

74Douglas County, ILIL19,88010.3%–

75Stephenson County, ILIL43,22010.3%–

76Montgomery County, ILIL28,07610.3%–

77Cass County, ILIL12,46310.0%–

78Effingham County, ILIL34,51910.0%–

79Jasper County, ILIL9,0329.9%–

80Vermilion County, ILIL71,2599.8%–

81Pope County, ILIL3,6729.8%–

82Christian County, ILIL33,4439.8%–

83Cumberland County, ILIL10,2089.6%–

84Washington County, ILIL13,5649.5%–

85Hancock County, ILIL16,8039.3%–

86Brown County, ILIL6,4019.3%–

87Lawrence County, ILIL13,7909.1%–

88St. Clair County, ILIL250,7089.1%–

89Edwards County, ILIL5,8989.1%–

90Moultrie County, ILIL14,3719.0%–

91Randolph County, ILIL29,9218.9%–

92Union County, ILIL16,6568.8%–

93Cook County, ILIL5,194,6258.7%–

94Pike County, ILIL14,2318.4%–

95Johnson County, ILIL13,3638.4%–

96Fayette County, ILIL20,7908.3%–

97Clinton County, ILIL37,1287.7%–

98Perry County, ILIL20,1607.5%–

99Calhoun County, ILIL4,3007.1%–

100Pulaski County, ILIL4,8206.9%–

101Shelby County, ILIL20,5766.2%–

102Alexander County, ILIL4,5705.5%–

SHOWING 1–102 OF 102

Download CSV (full list, 102 rows)

UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES