RANKING · 2020 CENSUS · 75 SHOWN OF 75

Highest Slovak population share, Illinois counties · 2020

Illinois counties ranked by the share of all residents who are Slovak ancestry (2023 American Community Survey). A concentration measure: Slovak residents as a percentage of total population. This list covers the 75 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

RANKPLACESTATEPOPSLOVAK SHAREVS 2000

01LaSalle County, ILIL107,7731.5%–

02Livingston County, ILIL35,0571.1%–

03Grundy County, ILIL54,0520.7%–

04Marshall County, ILIL11,4730.7%–

05Macoupin County, ILIL43,7480.6%–

06Kendall County, ILIL145,4700.6%–

07Will County, ILIL712,2530.6%–

08Putnam County, ILIL5,6190.5%–

09DuPage County, ILIL934,2980.5%–

10Sangamon County, ILIL194,1700.4%–

11Hamilton County, ILIL7,8590.4%–

12Montgomery County, ILIL28,0760.4%–

13Madison County, ILIL263,1100.3%–

14Jo Daviess County, ILIL21,5940.3%–

15Woodford County, ILIL38,1110.3%–

16Bureau County, ILIL32,5100.3%–

17McHenry County, ILIL317,7510.3%–

18Lake County, ILIL719,3390.3%–

19Cook County, ILIL5,194,6250.2%–

20Morgan County, ILIL32,5150.2%–

21Hancock County, ILIL16,8030.2%–

22Monroe County, ILIL34,8400.2%–

23Johnson County, ILIL13,3630.2%–

24DeKalb County, ILIL101,8350.2%–

25Pike County, ILIL14,2310.2%–

26McLean County, ILIL171,4190.2%–

27Christian County, ILIL33,4430.2%–

28Champaign County, ILIL209,9720.2%–

29Kane County, ILIL525,7570.2%–

30Mercer County, ILIL15,2290.2%–

31Henry County, ILIL48,0950.2%–

32Kankakee County, ILIL105,5250.2%–

33Carroll County, ILIL15,4190.1%–

34Ogle County, ILIL51,3990.1%–

35Jefferson County, ILIL36,1470.1%–

36Iroquois County, ILIL26,1500.1%–

37Whiteside County, ILIL54,1210.1%–

38Tazewell County, ILIL130,0490.1%–

39Peoria County, ILIL178,5530.1%–

40Winnebago County, ILIL283,6740.1%–

41Randolph County, ILIL29,9210.1%–

42Piatt County, ILIL16,7910.1%–

43Shelby County, ILIL20,5760.1%–

44Jackson County, ILIL52,5010.1%–

45St. Clair County, ILIL250,7080.1%–

46Vermilion County, ILIL71,2590.1%–

47Lee County, ILIL32,9140.1%–

48Ford County, ILIL13,2160.1%–

49Menard County, ILIL11,8630.1%–

50Edwards County, ILIL5,8980.1%–

51Edgar County, ILIL16,3230.1%–

52Franklin County, ILIL36,9160.1%–

53Clinton County, ILIL37,1280.1%–

54Macon County, ILIL99,3000.1%–

55Crawford County, ILIL18,6480.1%–

56Clay County, ILIL12,7930.1%–

57Effingham County, ILIL34,5190.0%–

58Logan County, ILIL27,1820.0%–

59Williamson County, ILIL67,2250.0%–

60Stark County, ILIL5,3190.0%–

61Union County, ILIL16,6560.0%–

62Perry County, ILIL20,1600.0%–

63Adams County, ILIL64,2670.0%–

64Rock Island County, ILIL141,8690.0%–

65Henderson County, ILIL5,9840.0%–

66Boone County, ILIL53,5680.0%–

67Moultrie County, ILIL14,3710.0%–

68Stephenson County, ILIL43,2200.0%–

69Cass County, ILIL12,4630.0%–

70Marion County, ILIL36,3820.0%–

71Knox County, ILIL47,7670.0%–

72Coles County, ILIL46,6070.0%–

73Wayne County, ILIL15,8820.0%–

74Warren County, ILIL16,2220.0%–

75Fayette County, ILIL20,7900.0%–

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