RANKING · 2020 CENSUS · 70 SHOWN OF 70

Highest Finnish population share, Illinois counties · 2020

Illinois counties ranked by the share of all residents who are Finnish ancestry (2023 American Community Survey). A concentration measure: Finnish residents as a percentage of total population. This list covers the 70 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

RANKPLACESTATEPOPFINNISH SHAREVS 2000

01Jo Daviess County, ILIL21,5940.5%–

02Fulton County, ILIL32,9010.4%–

03McHenry County, ILIL317,7510.4%–

04Lake County, ILIL719,3390.3%–

05Montgomery County, ILIL28,0760.3%–

06Boone County, ILIL53,5680.3%–

07DeKalb County, ILIL101,8350.2%–

08Ogle County, ILIL51,3990.2%–

09Winnebago County, ILIL283,6740.2%–

10Hancock County, ILIL16,8030.2%–

11Carroll County, ILIL15,4190.2%–

12McDonough County, ILIL25,9160.2%–

13Stephenson County, ILIL43,2200.2%–

14Ford County, ILIL13,2160.2%–

15Kane County, ILIL525,7570.2%–

16DuPage County, ILIL934,2980.2%–

17Grundy County, ILIL54,0520.1%–

18Bureau County, ILIL32,5100.1%–

19Will County, ILIL712,2530.1%–

20Coles County, ILIL46,6070.1%–

21Kendall County, ILIL145,4700.1%–

22Champaign County, ILIL209,9720.1%–

23LaSalle County, ILIL107,7730.1%–

24Cook County, ILIL5,194,6250.1%–

25Effingham County, ILIL34,5190.1%–

26Jackson County, ILIL52,5010.1%–

27McLean County, ILIL171,4190.1%–

28Rock Island County, ILIL141,8690.1%–

29Monroe County, ILIL34,8400.1%–

30Henry County, ILIL48,0950.1%–

31Tazewell County, ILIL130,0490.1%–

32Madison County, ILIL263,1100.1%–

33Sangamon County, ILIL194,1700.1%–

34Marshall County, ILIL11,4730.1%–

35Piatt County, ILIL16,7910.1%–

36Pope County, ILIL3,6720.1%–

37Union County, ILIL16,6560.1%–

38Whiteside County, ILIL54,1210.1%–

39Jefferson County, ILIL36,1470.1%–

40Franklin County, ILIL36,9160.1%–

41Kankakee County, ILIL105,5250.0%–

42Peoria County, ILIL178,5530.0%–

43Pike County, ILIL14,2310.0%–

44Morgan County, ILIL32,5150.0%–

45Cass County, ILIL12,4630.0%–

46Adams County, ILIL64,2670.0%–

47Vermilion County, ILIL71,2590.0%–

48Williamson County, ILIL67,2250.0%–

49Warren County, ILIL16,2220.0%–

50St. Clair County, ILIL250,7080.0%–

51Macoupin County, ILIL43,7480.0%–

52Fayette County, ILIL20,7900.0%–

53Johnson County, ILIL13,3630.0%–

54Marion County, ILIL36,3820.0%–

55Clinton County, ILIL37,1280.0%–

56Edgar County, ILIL16,3230.0%–

57Knox County, ILIL47,7670.0%–

58Logan County, ILIL27,1820.0%–

59Scott County, ILIL4,8660.0%–

60Perry County, ILIL20,1600.0%–

61Livingston County, ILIL35,0570.0%–

62Moultrie County, ILIL14,3710.0%–

63Christian County, ILIL33,4430.0%–

64Shelby County, ILIL20,5760.0%–

65Macon County, ILIL99,3000.0%–

66Saline County, ILIL22,7720.0%–

67Washington County, ILIL13,5640.0%–

68Mercer County, ILIL15,2290.0%–

69Wayne County, ILIL15,8820.0%–

70Lee County, ILIL32,9140.0%–

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