RANKING · 2010 CENSUS · 102 SHOWN OF 102

Largest Irish population, Illinois counties · 2010

Illinois counties ranked by the number of residents who are Irish ancestry, from the 2023 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.

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 2000

01Cook County, ILIL5,194,625523,306–

02DuPage County, ILIL934,298150,770–

03Will County, ILIL712,253123,997–

04Lake County, ILIL719,33989,892–

05Kane County, ILIL525,75765,521–

06McHenry County, ILIL317,75157,350–

07Madison County, ILIL263,11039,878–

08Winnebago County, ILIL283,67439,682–

09St. Clair County, ILIL250,70829,492–

10Sangamon County, ILIL194,17028,917–

11Peoria County, ILIL178,55327,364–

12McLean County, ILIL171,41925,700–

13Champaign County, ILIL209,97224,099–

14LaSalle County, ILIL107,77321,580–

15Rock Island County, ILIL141,86921,002–

16Tazewell County, ILIL130,04919,248–

17DeKalb County, ILIL101,83518,210–

18Kendall County, ILIL145,47016,924–

19Kankakee County, ILIL105,52515,942–

20Macon County, ILIL99,30014,304–

21Williamson County, ILIL67,22511,336–

22Grundy County, ILIL54,05211,192–

23Whiteside County, ILIL54,1219,102–

24Coles County, ILIL46,6078,769–

25Adams County, ILIL64,2678,767–

26Jackson County, ILIL52,5018,681–

27Vermilion County, ILIL71,2598,292–

28Ogle County, ILIL51,3998,172–

29Knox County, ILIL47,7677,869–

30Macoupin County, ILIL43,7487,796–

31Franklin County, ILIL36,9167,396–

32Henry County, ILIL48,0957,370–

33Boone County, ILIL53,5687,349–

34Lee County, ILIL32,9146,770–

35Livingston County, ILIL35,0576,720–

36Marion County, ILIL36,3826,270–

37Jefferson County, ILIL36,1476,195–

38Stephenson County, ILIL43,2205,993–

39Morgan County, ILIL32,5155,504–

40Woodford County, ILIL38,1115,395–

41Monroe County, ILIL34,8405,335–

42Fulton County, ILIL32,9014,905–

43Bureau County, ILIL32,5104,828–

44Saline County, ILIL22,7724,480–

45McDonough County, ILIL25,9164,472–

46Jo Daviess County, ILIL21,5944,468–

47Christian County, ILIL33,4434,450–

48Iroquois County, ILIL26,1504,236–

49Logan County, ILIL27,1823,991–

50Randolph County, ILIL29,9213,799–

51Clinton County, ILIL37,1283,647–

52Effingham County, ILIL34,5193,419–

53Montgomery County, ILIL28,0763,381–

54Jersey County, ILIL21,1603,363–

55Perry County, ILIL20,1603,226–

56Mercer County, ILIL15,2293,016–

57Edgar County, ILIL16,3232,864–

58Warren County, ILIL16,2222,603–

59Massac County, ILIL13,5022,490–

60Crawford County, ILIL18,6482,456–

61Clark County, ILIL15,1142,354–

62White County, ILIL13,2502,341–

63Hancock County, ILIL16,8032,328–

64Union County, ILIL16,6562,257–

65Piatt County, ILIL16,7912,238–

66Pike County, ILIL14,2312,229–

67Ford County, ILIL13,2162,189–

68Carroll County, ILIL15,4192,184–

69Douglas County, ILIL19,8802,136–

70Marshall County, ILIL11,4732,131–

71Greene County, ILIL11,3132,062–

72De Witt County, ILIL15,1182,058–

73Fayette County, ILIL20,7902,037–

74Menard County, ILIL11,8631,980–

75Shelby County, ILIL20,5761,964–

76Washington County, ILIL13,5641,942–

77Bond County, ILIL16,9591,812–

78Moultrie County, ILIL14,3711,771–

79Clay County, ILIL12,7931,750–

80Hamilton County, ILIL7,8591,747–

81Wayne County, ILIL15,8821,654–

82Lawrence County, ILIL13,7901,598–

83Mason County, ILIL12,4111,533–

84Richland County, ILIL15,2191,491–

85Johnson County, ILIL13,3631,467–

86Cass County, ILIL12,4631,449–

87Gallatin County, ILIL4,6161,323–

88Cumberland County, ILIL10,2081,300–

89Hardin County, ILIL3,5881,165–

90Henderson County, ILIL5,9841,079–

91Jasper County, ILIL9,0321,070–

92Wabash County, ILIL10,9071,016–

93Putnam County, ILIL5,6191,000–

94Stark County, ILIL5,319942–

95Schuyler County, ILIL6,657902–

96Brown County, ILIL6,401878–

97Scott County, ILIL4,866871–

98Pope County, ILIL3,672847–

99Calhoun County, ILIL4,300637–

100Alexander County, ILIL4,570577–

101Edwards County, ILIL5,898565–

102Pulaski County, ILIL4,820424–

SHOWING 1–102 OF 102

Download CSV (full list, 102 rows)

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