RANKING · 2010 CENSUS · 97 SHOWN OF 97

Highest Czech population share, Illinois counties · 2010

Illinois counties ranked by the share of all residents who are Czech ancestry (2010 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 97 counties in Illinois that qualify, ranked against each other statewide. The median across all 97 is 0.4%.

Czech 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

RANKPLACESTATEPOPCZECH SHAREVS –

01DuPage County, ILIL934,2982.5%–

02Grundy County, ILIL54,0522.0%–

03Kendall County, ILIL145,4702.0%–

04Will County, ILIL712,2531.9%–

05McHenry County, ILIL317,7511.8%–

06Carroll County, ILIL15,4191.5%–

07Kane County, ILIL525,7571.2%–

08DeKalb County, ILIL101,8351.1%–

09Mercer County, ILIL15,2291.1%–

10Pope County, ILIL3,6721.1%–

11Ogle County, ILIL51,3991.0%–

12Lake County, ILIL719,3391.0%–

13Cook County, ILIL5,194,6251.0%–

14Marshall County, ILIL11,4730.9%–

15Monroe County, ILIL34,8400.9%–

16LaSalle County, ILIL107,7730.9%–

17Whiteside County, ILIL54,1210.8%–

18Boone County, ILIL53,5680.7%–

19Lee County, ILIL32,9140.7%–

20Montgomery County, ILIL28,0760.7%–

21Rock Island County, ILIL141,8690.7%–

22Henry County, ILIL48,0950.7%–

23Madison County, ILIL263,1100.6%–

24McLean County, ILIL171,4190.6%–

25Kankakee County, ILIL105,5250.6%–

26Piatt County, ILIL16,7910.6%–

27Peoria County, ILIL178,5530.6%–

28Williamson County, ILIL67,2250.6%–

29Stephenson County, ILIL43,2200.6%–

30Winnebago County, ILIL283,6740.6%–

31Macoupin County, ILIL43,7480.6%–

32Christian County, ILIL33,4430.5%–

33Morgan County, ILIL32,5150.5%–

34St. Clair County, ILIL250,7080.5%–

35Bureau County, ILIL32,5100.5%–

36Henderson County, ILIL5,9840.5%–

37Jo Daviess County, ILIL21,5940.5%–

38McDonough County, ILIL25,9160.5%–

39Alexander County, ILIL4,5700.5%–

40Champaign County, ILIL209,9720.5%–

41Fayette County, ILIL20,7900.5%–

42Tazewell County, ILIL130,0490.5%–

43Massac County, ILIL13,5020.4%–

44Livingston County, ILIL35,0570.4%–

45Woodford County, ILIL38,1110.4%–

46Hancock County, ILIL16,8030.4%–

47Logan County, ILIL27,1820.4%–

48Sangamon County, ILIL194,1700.4%–

49Cumberland County, ILIL10,2080.4%–

50Jackson County, ILIL52,5010.4%–

51Fulton County, ILIL32,9010.4%–

52Knox County, ILIL47,7670.4%–

53Union County, ILIL16,6560.4%–

54Hamilton County, ILIL7,8590.4%–

55Shelby County, ILIL20,5760.3%–

56Calhoun County, ILIL4,3000.3%–

57Iroquois County, ILIL26,1500.3%–

58Jasper County, ILIL9,0320.3%–

59Johnson County, ILIL13,3630.3%–

60Edgar County, ILIL16,3230.3%–

61Franklin County, ILIL36,9160.3%–

62Ford County, ILIL13,2160.3%–

63Coles County, ILIL46,6070.3%–

64Menard County, ILIL11,8630.3%–

65Vermilion County, ILIL71,2590.3%–

66Clinton County, ILIL37,1280.3%–

67Adams County, ILIL64,2670.3%–

68Bond County, ILIL16,9590.2%–

69Macon County, ILIL99,3000.2%–

70Marion County, ILIL36,3820.2%–

71Crawford County, ILIL18,6480.2%–

72Randolph County, ILIL29,9210.2%–

73Warren County, ILIL16,2220.2%–

74Cass County, ILIL12,4630.2%–

75Wabash County, ILIL10,9070.2%–

76Stark County, ILIL5,3190.2%–

77Edwards County, ILIL5,8980.2%–

78Perry County, ILIL20,1600.2%–

79Jersey County, ILIL21,1600.2%–

80Jefferson County, ILIL36,1470.2%–

81Pulaski County, ILIL4,8200.2%–

82White County, ILIL13,2500.2%–

83Moultrie County, ILIL14,3710.1%–

84Washington County, ILIL13,5640.1%–

85Wayne County, ILIL15,8820.1%–

86Scott County, ILIL4,8660.1%–

87Putnam County, ILIL5,6190.1%–

88Saline County, ILIL22,7720.1%–

89Mason County, ILIL12,4110.1%–

90Richland County, ILIL15,2190.1%–

91Clark County, ILIL15,1140.1%–

92Effingham County, ILIL34,5190.0%–

93Greene County, ILIL11,3130.0%–

94Lawrence County, ILIL13,7900.0%–

95De Witt County, ILIL15,1180.0%–

96Douglas County, ILIL19,8800.0%–

97Pike County, ILIL14,2310.0%–

SHOWING 1–97 OF 97

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