RANKING · 2020 CENSUS · 102 SHOWN OF 102

Most segregated, Illinois counties · 2020

Illinois counties ranked by the CensusEasy Segregation Score, the White vs non-White index of dissimilarity across census tracts (2020 ACS). Higher means residents are more sorted into separate neighborhoods. This list covers the 102 counties in Illinois that qualify, ranked against each other statewide.

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SAME RANKING BYMetros

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPSEGREGATION SCOREVS –

01Johnson County, ILIL13,36381–

02Randolph County, ILIL29,92160–

03Crawford County, ILIL18,64859–

04Fayette County, ILIL20,79056–

05Cook County, ILIL5,194,62554–

06Cass County, ILIL12,46354–

07Alexander County, ILIL4,57053–

08Kane County, ILIL525,75752–

09Stephenson County, ILIL43,22051–

10Vermilion County, ILIL71,25950–

11Fulton County, ILIL32,90148–

12St. Clair County, ILIL250,70848–

13Morgan County, ILIL32,51547–

14Logan County, ILIL27,18247–

15Montgomery County, ILIL28,07646–

16Calhoun County, ILIL4,30046–

17Douglas County, ILIL19,88046–

18Peoria County, ILIL178,55345–

19Whiteside County, ILIL54,12144–

20Lake County, ILIL719,33944–

21Will County, ILIL712,25343–

22Kankakee County, ILIL105,52543–

23Lawrence County, ILIL13,79042–

24Macon County, ILIL99,30042–

25Sangamon County, ILIL194,17042–

26Warren County, ILIL16,22242–

27Bond County, ILIL16,95941–

28Winnebago County, ILIL283,67441–

29Schuyler County, ILIL6,65741–

30Knox County, ILIL47,76740–

31Brown County, ILIL6,40140–

32Bureau County, ILIL32,51040–

33Marion County, ILIL36,38238–

34Jackson County, ILIL52,50138–

35Jefferson County, ILIL36,14738–

36Perry County, ILIL20,16037–

37Coles County, ILIL46,60736–

38Champaign County, ILIL209,97236–

39Madison County, ILIL263,11036–

40Iroquois County, ILIL26,15035–

41Boone County, ILIL53,56835–

42Ogle County, ILIL51,39934–

43Effingham County, ILIL34,51934–

44Macoupin County, ILIL43,74834–

45McDonough County, ILIL25,91633–

46DuPage County, ILIL934,29833–

47Rock Island County, ILIL141,86933–

48Richland County, ILIL15,21932–

49DeKalb County, ILIL101,83532–

50Adams County, ILIL64,26731–

51Clinton County, ILIL37,12831–

52Scott County, ILIL4,86630–

53Williamson County, ILIL67,22530–

54LaSalle County, ILIL107,77330–

55Pulaski County, ILIL4,82029–

56Marshall County, ILIL11,47329–

57Clay County, ILIL12,79329–

58Lee County, ILIL32,91429–

59McLean County, ILIL171,41928–

60Henry County, ILIL48,09527–

61Livingston County, ILIL35,05726–

62Christian County, ILIL33,44326–

63Saline County, ILIL22,77225–

64Hancock County, ILIL16,80325–

65Pike County, ILIL14,23124–

66Ford County, ILIL13,21624–

67Washington County, ILIL13,56423–

68Franklin County, ILIL36,91623–

69Grundy County, ILIL54,05222–

70Tazewell County, ILIL130,04922–

71McHenry County, ILIL317,75122–

72White County, ILIL13,25022–

73Edgar County, ILIL16,32322–

74Pope County, ILIL3,67221–

75Kendall County, ILIL145,47021–

76Monroe County, ILIL34,84020–

77Woodford County, ILIL38,11120–

78De Witt County, ILIL15,11819–

79Moultrie County, ILIL14,37119–

80Jasper County, ILIL9,03219–

81Wabash County, ILIL10,90719–

82Piatt County, ILIL16,79119–

83Cumberland County, ILIL10,20818–

84Jo Daviess County, ILIL21,59418–

85Carroll County, ILIL15,41918–

86Hardin County, ILIL3,58817–

87Mercer County, ILIL15,22917–

88Hamilton County, ILIL7,85917–

89Greene County, ILIL11,31317–

90Menard County, ILIL11,86317–

91Mason County, ILIL12,41117–

92Shelby County, ILIL20,57616–

93Union County, ILIL16,65616–

94Wayne County, ILIL15,88215–

95Jersey County, ILIL21,16015–

96Edwards County, ILIL5,89814–

97Henderson County, ILIL5,98413–

98Putnam County, ILIL5,61911–

99Clark County, ILIL15,11410–

100Massac County, ILIL13,5028–

101Gallatin County, ILIL4,6167–

102Stark County, ILIL5,3190–

SHOWING 1–102 OF 102

Download CSV (full list, 102 rows)How this score is calculated

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