RANKING · 2020 CENSUS · 96 SHOWN OF 96

Highest Czech population share, Illinois counties · 2020

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 96 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, ILIL934,2981.9%–

02Will County, ILIL712,2531.4%–

03McHenry County, ILIL317,7511.3%–

04Kendall County, ILIL145,4701.2%–

05Jo Daviess County, ILIL21,5941.2%–

06Grundy County, ILIL54,0521.1%–

07Livingston County, ILIL35,0571.0%–

08DeKalb County, ILIL101,8351.0%–

09Kane County, ILIL525,7570.9%–

10Boone County, ILIL53,5680.9%–

11LaSalle County, ILIL107,7730.8%–

12Lake County, ILIL719,3390.8%–

13Jersey County, ILIL21,1600.8%–

14Woodford County, ILIL38,1110.7%–

15Piatt County, ILIL16,7910.7%–

16Cook County, ILIL5,194,6250.7%–

17Bond County, ILIL16,9590.7%–

18Mercer County, ILIL15,2290.6%–

19Stephenson County, ILIL43,2200.6%–

20Lee County, ILIL32,9140.6%–

21Rock Island County, ILIL141,8690.6%–

22Henry County, ILIL48,0950.6%–

23Moultrie County, ILIL14,3710.5%–

24McLean County, ILIL171,4190.5%–

25Kankakee County, ILIL105,5250.5%–

26Madison County, ILIL263,1100.5%–

27Menard County, ILIL11,8630.5%–

28Iroquois County, ILIL26,1500.4%–

29Winnebago County, ILIL283,6740.4%–

30Ford County, ILIL13,2160.4%–

31Monroe County, ILIL34,8400.4%–

32Champaign County, ILIL209,9720.4%–

33Bureau County, ILIL32,5100.4%–

34Washington County, ILIL13,5640.4%–

35Clark County, ILIL15,1140.4%–

36Knox County, ILIL47,7670.4%–

37Coles County, ILIL46,6070.4%–

38McDonough County, ILIL25,9160.4%–

39Ogle County, ILIL51,3990.4%–

40Logan County, ILIL27,1820.4%–

41Putnam County, ILIL5,6190.3%–

42Jackson County, ILIL52,5010.3%–

43Sangamon County, ILIL194,1700.3%–

44Carroll County, ILIL15,4190.3%–

45Whiteside County, ILIL54,1210.3%–

46Schuyler County, ILIL6,6570.3%–

47St. Clair County, ILIL250,7080.3%–

48Peoria County, ILIL178,5530.3%–

49Morgan County, ILIL32,5150.3%–

50Crawford County, ILIL18,6480.3%–

51Macon County, ILIL99,3000.3%–

52Perry County, ILIL20,1600.3%–

53Henderson County, ILIL5,9840.3%–

54Marion County, ILIL36,3820.3%–

55Tazewell County, ILIL130,0490.3%–

56Jefferson County, ILIL36,1470.2%–

57Marshall County, ILIL11,4730.2%–

58Fulton County, ILIL32,9010.2%–

59Douglas County, ILIL19,8800.2%–

60Montgomery County, ILIL28,0760.2%–

61Hancock County, ILIL16,8030.2%–

62Calhoun County, ILIL4,3000.2%–

63Macoupin County, ILIL43,7480.2%–

64Massac County, ILIL13,5020.2%–

65Clinton County, ILIL37,1280.2%–

66Shelby County, ILIL20,5760.2%–

67Union County, ILIL16,6560.2%–

68Randolph County, ILIL29,9210.2%–

69Williamson County, ILIL67,2250.2%–

70Vermilion County, ILIL71,2590.2%–

71Effingham County, ILIL34,5190.2%–

72Johnson County, ILIL13,3630.2%–

73Alexander County, ILIL4,5700.1%–

74Richland County, ILIL15,2190.1%–

75Hamilton County, ILIL7,8590.1%–

76Pike County, ILIL14,2310.1%–

77Franklin County, ILIL36,9160.1%–

78Jasper County, ILIL9,0320.1%–

79De Witt County, ILIL15,1180.1%–

80Christian County, ILIL33,4430.1%–

81Brown County, ILIL6,4010.1%–

82Cumberland County, ILIL10,2080.1%–

83Adams County, ILIL64,2670.1%–

84Fayette County, ILIL20,7900.1%–

85Wabash County, ILIL10,9070.1%–

86Edwards County, ILIL5,8980.1%–

87Lawrence County, ILIL13,7900.1%–

88Pope County, ILIL3,6720.1%–

89Warren County, ILIL16,2220.1%–

90Clay County, ILIL12,7930.1%–

91Wayne County, ILIL15,8820.1%–

92Scott County, ILIL4,8660.0%–

93Saline County, ILIL22,7720.0%–

94Mason County, ILIL12,4110.0%–

95Greene County, ILIL11,3130.0%–

96Cass County, ILIL12,4630.0%–

SHOWING 1–96 OF 96

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