RANKING · 2020 CENSUS · 70 SHOWN OF 70

Largest Finnish population, Illinois counties · 2020

Illinois counties ranked by the number of residents who are Finnish 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 70 counties in Illinois that qualify, ranked against each other statewide.

Finnish 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

RANKPLACESTATEPOPFINNISH POPULATIONVS 2010

01Cook County, ILIL5,194,6256,019+2%

02Lake County, ILIL719,3392,249−44%

03DuPage County, ILIL934,2981,567−16%

04McHenry County, ILIL317,7511,115+57%

05Will County, ILIL712,253968+15%

06Kane County, ILIL525,757906−16%

07Winnebago County, ILIL283,674626−16%

08Champaign County, ILIL209,972275+64%

09DeKalb County, ILIL101,835246−20%

10Madison County, ILIL263,110225−30%

11McLean County, ILIL171,419187+10%

12Kendall County, ILIL145,470169−35%

13Sangamon County, ILIL194,170164+332%

14Rock Island County, ILIL141,869152−46%

15Fulton County, ILIL32,901144+1500%

16Boone County, ILIL53,568139−13%

17LaSalle County, ILIL107,773135+53%

18Ogle County, ILIL51,399115+24%

19Tazewell County, ILIL130,049113−14%

20Jo Daviess County, ILIL21,594112+261%

21Montgomery County, ILIL28,07690+4400%

22St. Clair County, ILIL250,70887−24%

23Peoria County, ILIL178,55384−30%

24Stephenson County, ILIL43,22082+8%

25Grundy County, ILIL54,05274+95%

26Coles County, ILIL46,60769–

27Jackson County, ILIL52,50163+47%

28McDonough County, ILIL25,91662+148%

29Kankakee County, ILIL105,52551+2%

30Bureau County, ILIL32,51047−45%

31Henry County, ILIL48,09545−6%

32Hancock County, ILIL16,80339+11%

33Effingham County, ILIL34,51939−17%

34Whiteside County, ILIL54,12134−69%

35Monroe County, ILIL34,84032–

36Carroll County, ILIL15,41931–

37Vermilion County, ILIL71,25930+173%

38Adams County, ILIL64,26726−64%

39Williamson County, ILIL67,22526−42%

40Ford County, ILIL13,21623–

41Jefferson County, ILIL36,14721+50%

42Franklin County, ILIL36,91620−67%

43Macoupin County, ILIL43,74815−75%

44Morgan County, ILIL32,51514−64%

45Piatt County, ILIL16,79112+300%

46Union County, ILIL16,65612+0%

47Marion County, ILIL36,38212−25%

48Knox County, ILIL47,76711−79%

49Macon County, ILIL99,3009−47%

50Marshall County, ILIL11,4739−69%

51Clinton County, ILIL37,1289−78%

52Fayette County, ILIL20,7907+40%

53Pike County, ILIL14,2317–

54Livingston County, ILIL35,0576−80%

55Logan County, ILIL27,1826−33%

56Warren County, ILIL16,2226−14%

57Cass County, ILIL12,4635−82%

58Edgar County, ILIL16,3234–

59Johnson County, ILIL13,3634–

60Perry County, ILIL20,1604–

61Christian County, ILIL33,4434−86%

62Pope County, ILIL3,6723–

63Lee County, ILIL32,9142−89%

64Shelby County, ILIL20,5762−88%

65Moultrie County, ILIL14,3712−33%

66Saline County, ILIL22,7722−92%

67Mercer County, ILIL15,2291–

68Wayne County, ILIL15,8821–

69Scott County, ILIL4,8661–

70Washington County, ILIL13,5641–

SHOWING 1–70 OF 70

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