RANKING · 2024 ACS · 93 SHOWN OF 93

Highest Czech population share, Illinois counties

Illinois counties ranked by the share of all residents who are Czech ancestry (2023 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 93 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

RANKPLACESTATEPOPCZECH SHAREVS 2000

01DuPage County, ILIL934,2981.5%–

02Grundy County, ILIL54,0521.2%–

03Will County, ILIL712,2531.2%–

04McHenry County, ILIL317,7511.2%–

05Kendall County, ILIL145,4701.1%–

06Jo Daviess County, ILIL21,5941.0%–

07DeKalb County, ILIL101,8350.9%–

08Kane County, ILIL525,7570.9%–

09Jersey County, ILIL21,1600.8%–

10LaSalle County, ILIL107,7730.8%–

11Calhoun County, ILIL4,3000.8%–

12Scott County, ILIL4,8660.8%–

13Piatt County, ILIL16,7910.8%–

14Mercer County, ILIL15,2290.7%–

15Ogle County, ILIL51,3990.6%–

16Boone County, ILIL53,5680.6%–

17Monroe County, ILIL34,8400.6%–

18Cook County, ILIL5,194,6250.6%–

19Madison County, ILIL263,1100.6%–

20Lake County, ILIL719,3390.6%–

21Bureau County, ILIL32,5100.5%–

22Christian County, ILIL33,4430.5%–

23Henry County, ILIL48,0950.5%–

24Kankakee County, ILIL105,5250.5%–

25Carroll County, ILIL15,4190.5%–

26Lee County, ILIL32,9140.5%–

27Moultrie County, ILIL14,3710.4%–

28Livingston County, ILIL35,0570.4%–

29Champaign County, ILIL209,9720.4%–

30McLean County, ILIL171,4190.4%–

31Stephenson County, ILIL43,2200.4%–

32Winnebago County, ILIL283,6740.4%–

33Marion County, ILIL36,3820.4%–

34Menard County, ILIL11,8630.4%–

35Rock Island County, ILIL141,8690.4%–

36Pope County, ILIL3,6720.3%–

37Montgomery County, ILIL28,0760.3%–

38Woodford County, ILIL38,1110.3%–

39Fulton County, ILIL32,9010.3%–

40Coles County, ILIL46,6070.3%–

41Peoria County, ILIL178,5530.3%–

42St. Clair County, ILIL250,7080.3%–

43Jackson County, ILIL52,5010.3%–

44Iroquois County, ILIL26,1500.3%–

45Tazewell County, ILIL130,0490.3%–

46Jefferson County, ILIL36,1470.3%–

47Washington County, ILIL13,5640.3%–

48Hardin County, ILIL3,5880.2%–

49Vermilion County, ILIL71,2590.2%–

50Cumberland County, ILIL10,2080.2%–

51Whiteside County, ILIL54,1210.2%–

52Shelby County, ILIL20,5760.2%–

53Fayette County, ILIL20,7900.2%–

54Richland County, ILIL15,2190.2%–

55Sangamon County, ILIL194,1700.2%–

56Macoupin County, ILIL43,7480.2%–

57Marshall County, ILIL11,4730.2%–

58Warren County, ILIL16,2220.2%–

59Clark County, ILIL15,1140.2%–

60Putnam County, ILIL5,6190.2%–

61Randolph County, ILIL29,9210.2%–

62Knox County, ILIL47,7670.2%–

63Crawford County, ILIL18,6480.2%–

64Bond County, ILIL16,9590.2%–

65Adams County, ILIL64,2670.2%–

66Perry County, ILIL20,1600.2%–

67Stark County, ILIL5,3190.2%–

68Saline County, ILIL22,7720.2%–

69Hancock County, ILIL16,8030.2%–

70Schuyler County, ILIL6,6570.2%–

71Johnson County, ILIL13,3630.2%–

72Henderson County, ILIL5,9840.1%–

73Williamson County, ILIL67,2250.1%–

74Hamilton County, ILIL7,8590.1%–

75Macon County, ILIL99,3000.1%–

76McDonough County, ILIL25,9160.1%–

77Morgan County, ILIL32,5150.1%–

78Logan County, ILIL27,1820.1%–

79Franklin County, ILIL36,9160.1%–

80Alexander County, ILIL4,5700.1%–

81Clinton County, ILIL37,1280.1%–

82Ford County, ILIL13,2160.1%–

83White County, ILIL13,2500.1%–

84Mason County, ILIL12,4110.1%–

85Pike County, ILIL14,2310.1%–

86Lawrence County, ILIL13,7900.0%–

87Wayne County, ILIL15,8820.0%–

88Clay County, ILIL12,7930.0%–

89Douglas County, ILIL19,8800.0%–

90De Witt County, ILIL15,1180.0%–

91Union County, ILIL16,6560.0%–

92Cass County, ILIL12,4630.0%–

93Effingham County, ILIL34,5190.0%–

SHOWING 1–93 OF 93

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