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 (2020 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. The median across all 75 is 0.1%.

Slovak Americans: full group profile →

IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSLOVAK SHAREVS 2010

01LaSalle County, ILIL107,7731.5%−1.3 pts

02Livingston County, ILIL35,0571.1%−0.3 pts

03Grundy County, ILIL54,0520.7%−0.1 pts

04Marshall County, ILIL11,4730.7%−0.2 pts

05Macoupin County, ILIL43,7480.6%−0.2 pts

06Kendall County, ILIL145,4700.6%+0.1 pts

07Will County, ILIL712,2530.6%−0.3 pts

08Putnam County, ILIL5,6190.5%−1.0 pts

09DuPage County, ILIL934,2980.5%−0.1 pts

10Sangamon County, ILIL194,1700.4%0.0 pts

11Hamilton County, ILIL7,8590.4%–

12Montgomery County, ILIL28,0760.4%+0.1 pts

13Madison County, ILIL263,1100.3%+0.1 pts

14Jo Daviess County, ILIL21,5940.3%+0.3 pts

15Woodford County, ILIL38,1110.3%+0.1 pts

16Bureau County, ILIL32,5100.3%0.0 pts

17McHenry County, ILIL317,7510.3%0.0 pts

18Lake County, ILIL719,3390.3%−0.1 pts

19Cook County, ILIL5,194,6250.2%0.0 pts

20Morgan County, ILIL32,5150.2%+0.2 pts

21Hancock County, ILIL16,8030.2%+0.1 pts

22Monroe County, ILIL34,8400.2%+0.1 pts

23Johnson County, ILIL13,3630.2%0.0 pts

24DeKalb County, ILIL101,8350.2%0.0 pts

25Pike County, ILIL14,2310.2%–

26McLean County, ILIL171,4190.2%−0.2 pts

27Christian County, ILIL33,4430.2%−0.1 pts

28Champaign County, ILIL209,9720.2%0.0 pts

29Kane County, ILIL525,7570.2%−0.1 pts

30Mercer County, ILIL15,2290.2%−0.1 pts

31Henry County, ILIL48,0950.2%+0.1 pts

32Kankakee County, ILIL105,5250.2%−0.1 pts

33Carroll County, ILIL15,4190.1%+0.1 pts

34Ogle County, ILIL51,3990.1%−0.1 pts

35Jefferson County, ILIL36,1470.1%+0.1 pts

36Iroquois County, ILIL26,1500.1%0.0 pts

37Whiteside County, ILIL54,1210.1%0.0 pts

38Tazewell County, ILIL130,0490.1%0.0 pts

39Peoria County, ILIL178,5530.1%−0.1 pts

40Winnebago County, ILIL283,6740.1%0.0 pts

41Randolph County, ILIL29,9210.1%−0.1 pts

42Piatt County, ILIL16,7910.1%+0.1 pts

43Shelby County, ILIL20,5760.1%−0.1 pts

44Jackson County, ILIL52,5010.1%0.0 pts

45St. Clair County, ILIL250,7080.1%−0.1 pts

46Vermilion County, ILIL71,2590.1%−0.2 pts

47Lee County, ILIL32,9140.1%−0.1 pts

48Ford County, ILIL13,2160.1%−0.2 pts

49Menard County, ILIL11,8630.1%−0.1 pts

50Edwards County, ILIL5,8980.1%−0.1 pts

51Edgar County, ILIL16,3230.1%0.0 pts

52Franklin County, ILIL36,9160.1%−0.1 pts

53Clinton County, ILIL37,1280.1%0.0 pts

54Macon County, ILIL99,3000.1%0.0 pts

55Crawford County, ILIL18,6480.1%−0.1 pts

56Clay County, ILIL12,7930.1%–

57Effingham County, ILIL34,5190.0%0.0 pts

58Logan County, ILIL27,1820.0%0.0 pts

59Williamson County, ILIL67,2250.0%−0.1 pts

60Stark County, ILIL5,3190.0%−0.2 pts

61Union County, ILIL16,6560.0%0.0 pts

62Perry County, ILIL20,1600.0%0.0 pts

63Adams County, ILIL64,2670.0%−0.1 pts

64Rock Island County, ILIL141,8690.0%−0.1 pts

65Henderson County, ILIL5,9840.0%–

66Boone County, ILIL53,5680.0%0.0 pts

67Moultrie County, ILIL14,3710.0%0.0 pts

68Stephenson County, ILIL43,2200.0%−0.1 pts

69Cass County, ILIL12,4630.0%−0.3 pts

70Marion County, ILIL36,3820.0%0.0 pts

71Knox County, ILIL47,7670.0%0.0 pts

72Coles County, ILIL46,6070.0%−0.1 pts

73Wayne County, ILIL15,8820.0%–

74Warren County, ILIL16,2220.0%−0.2 pts

75Fayette County, ILIL20,7900.0%−0.1 pts

SHOWING 1–75 OF 75

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