RANKING · 2010 CENSUS · 71 SHOWN OF 71

Highest Finnish population share, Illinois counties · 2010

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 71 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

01Lake County, ILIL719,3390.6%–

02Boone County, ILIL53,5680.3%–

03DeKalb County, ILIL101,8350.3%–

04Winnebago County, ILIL283,6740.3%–

05Kendall County, ILIL145,4700.2%–

06Bureau County, ILIL32,5100.2%–

07McHenry County, ILIL317,7510.2%–

08Marshall County, ILIL11,4730.2%–

09Kane County, ILIL525,7570.2%–

10DuPage County, ILIL934,2980.2%–

11Cass County, ILIL12,4630.2%–

12Schuyler County, ILIL6,6570.2%–

13Rock Island County, ILIL141,8690.2%–

14Whiteside County, ILIL54,1210.2%–

15Hancock County, ILIL16,8030.2%–

16Ogle County, ILIL51,3990.2%–

17Stephenson County, ILIL43,2200.2%–

18Franklin County, ILIL36,9160.2%–

19Richland County, ILIL15,2190.1%–

20Woodford County, ILIL38,1110.1%–

21Effingham County, ILIL34,5190.1%–

22Jo Daviess County, ILIL21,5940.1%–

23Will County, ILIL712,2530.1%–

24Macoupin County, ILIL43,7480.1%–

25Madison County, ILIL263,1100.1%–

26Cook County, ILIL5,194,6250.1%–

27Morgan County, ILIL32,5150.1%–

28Adams County, ILIL64,2670.1%–

29Clinton County, ILIL37,1280.1%–

30McLean County, ILIL171,4190.1%–

31Saline County, ILIL22,7720.1%–

32Tazewell County, ILIL130,0490.1%–

33Knox County, ILIL47,7670.1%–

34Henry County, ILIL48,0950.1%–

35Champaign County, ILIL209,9720.1%–

36Christian County, ILIL33,4430.1%–

37Grundy County, ILIL54,0520.1%–

38LaSalle County, ILIL107,7730.1%–

39Livingston County, ILIL35,0570.1%–

40McDonough County, ILIL25,9160.1%–

41Douglas County, ILIL19,8800.1%–

42Jackson County, ILIL52,5010.1%–

43Shelby County, ILIL20,5760.1%–

44Jersey County, ILIL21,1600.1%–

45Williamson County, ILIL67,2250.1%–

46Union County, ILIL16,6560.1%–

47Peoria County, ILIL178,5530.1%–

48Lee County, ILIL32,9140.0%–

49Menard County, ILIL11,8630.0%–

50Bond County, ILIL16,9590.0%–

51Kankakee County, ILIL105,5250.0%–

52St. Clair County, ILIL250,7080.0%–

53Clark County, ILIL15,1140.0%–

54Marion County, ILIL36,3820.0%–

55Warren County, ILIL16,2220.0%–

56Jefferson County, ILIL36,1470.0%–

57Putnam County, ILIL5,6190.0%–

58De Witt County, ILIL15,1180.0%–

59Logan County, ILIL27,1820.0%–

60Fulton County, ILIL32,9010.0%–

61Fayette County, ILIL20,7900.0%–

62Moultrie County, ILIL14,3710.0%–

63White County, ILIL13,2500.0%–

64Sangamon County, ILIL194,1700.0%–

65Cumberland County, ILIL10,2080.0%–

66Piatt County, ILIL16,7910.0%–

67Macon County, ILIL99,3000.0%–

68Vermilion County, ILIL71,2590.0%–

69Montgomery County, ILIL28,0760.0%–

70Crawford County, ILIL18,6480.0%–

71Iroquois County, ILIL26,1500.0%–

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