RANKING · 2020 CENSUS · 75 SHOWN OF 75

Largest Slovak population, Illinois counties · 2020

Illinois counties ranked by the number of residents who are Slovak ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 75 counties in Illinois that qualify, ranked against each other statewide.

Slovak Americans: full group profile →

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 POPULATIONVS 2010

01Cook County, ILIL5,194,62512,372−15%

02DuPage County, ILIL934,2984,429−16%

03Will County, ILIL712,2533,813−34%

04Lake County, ILIL719,3391,821−22%

05LaSalle County, ILIL107,7731,667−48%

06Kane County, ILIL525,757961−34%

07McHenry County, ILIL317,751878+18%

08Madison County, ILIL263,110875+22%

09Sangamon County, ILIL194,170798+12%

10Kendall County, ILIL145,470723+57%

11Champaign County, ILIL209,972387+6%

12Livingston County, ILIL35,057380−29%

13Grundy County, ILIL54,052378−5%

14McLean County, ILIL171,419351−43%

15Winnebago County, ILIL283,674304+21%

16Macoupin County, ILIL43,748285−28%

17St. Clair County, ILIL250,708250−36%

18DeKalb County, ILIL101,835217−17%

19Peoria County, ILIL178,553201−53%

20Kankakee County, ILIL105,525186−30%

21Tazewell County, ILIL130,049150+1%

22Montgomery County, ILIL28,076111+13%

23Woodford County, ILIL38,111111+23%

24Bureau County, ILIL32,51094−4%

25Henry County, ILIL48,09583+177%

26Marshall County, ILIL11,47382−28%

27Morgan County, ILIL32,51580+900%

28Monroe County, ILIL34,84073+115%

29Vermilion County, ILIL71,25971−67%

30Jo Daviess County, ILIL21,59466+450%

31Ogle County, ILIL51,39966−50%

32Whiteside County, ILIL54,12165+16%

33Christian County, ILIL33,44365−38%

34Macon County, ILIL99,30058−43%

35Jackson County, ILIL52,50156+75%

36Jefferson County, ILIL36,14747+2250%

37Rock Island County, ILIL141,86943−75%

38Hancock County, ILIL16,80340+74%

39Randolph County, ILIL29,92134−44%

40Iroquois County, ILIL26,15033+32%

41Hamilton County, ILIL7,85932–

42Pike County, ILIL14,23132–

43Lee County, ILIL32,91431−52%

44Putnam County, ILIL5,61931−67%

45Mercer County, ILIL15,22927−37%

46Johnson County, ILIL13,36326−7%

47Williamson County, ILIL67,22526−62%

48Shelby County, ILIL20,57622−37%

49Franklin County, ILIL36,91622−63%

50Carroll County, ILIL15,41921+600%

51Clinton County, ILIL37,12821+163%

52Adams County, ILIL64,26720−79%

53Piatt County, ILIL16,79117+240%

54Boone County, ILIL53,56815−50%

55Effingham County, ILIL34,51915−17%

56Knox County, ILIL47,76712−40%

57Logan County, ILIL27,18212+33%

58Stephenson County, ILIL43,22012−78%

59Edgar County, ILIL16,32311+10%

60Ford County, ILIL13,21611−67%

61Coles County, ILIL46,60710−85%

62Menard County, ILIL11,86310−63%

63Crawford County, ILIL18,64810−57%

64Marion County, ILIL36,3829−31%

65Clay County, ILIL12,7937–

66Perry County, ILIL20,1607−46%

67Union County, ILIL16,6566−57%

68Edwards County, ILIL5,8985−44%

69Moultrie County, ILIL14,3714+100%

70Warren County, ILIL16,2223−90%

71Wayne County, ILIL15,8823–

72Cass County, ILIL12,4633−92%

73Fayette County, ILIL20,7902−93%

74Stark County, ILIL5,3192−86%

75Henderson County, ILIL5,9842–

SHOWING 1–75 OF 75

Download CSV (full list, 75 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS