RANKING · 2024 ACS · 102 SHOWN OF 102

Most segregated, Illinois counties

Illinois counties ranked by the CensusEasy Segregation Score, the White vs non-White index of dissimilarity across census tracts (2024 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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RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPSEGREGATION SCOREVS 2020

01Alexander County, ILIL4,57062+16%

02Cook County, ILIL5,194,62552−4%

03Vermilion County, ILIL71,25951+2%

04Kane County, ILIL525,75749−8%

05Randolph County, ILIL29,92147−22%

06Douglas County, ILIL19,88045−2%

07Brown County, ILIL6,40144+12%

08Carroll County, ILIL15,41944+152%

09Lake County, ILIL719,33943−3%

10Peoria County, ILIL178,55342−7%

11Kankakee County, ILIL105,52542−3%

12Macon County, ILIL99,30041−2%

13Fulton County, ILIL32,90141−15%

14Cass County, ILIL12,46341−25%

15Will County, ILIL712,25340−7%

16St. Clair County, ILIL250,70840−16%

17Stephenson County, ILIL43,22039−23%

18Montgomery County, ILIL28,07639−17%

19Sangamon County, ILIL194,17038−10%

20Winnebago County, ILIL283,67437−10%

21Crawford County, ILIL18,64837−38%

22Champaign County, ILIL209,97236−0%

23Whiteside County, ILIL54,12135−19%

24Iroquois County, ILIL26,15035−1%

25Knox County, ILIL47,76735−13%

26Warren County, ILIL16,22235−17%

27Jackson County, ILIL52,50134−12%

28McDonough County, ILIL25,91634+1%

29DeKalb County, ILIL101,83533+1%

30Johnson County, ILIL13,36332−61%

31Logan County, ILIL27,18231−33%

32Pulaski County, ILIL4,82031+7%

33Madison County, ILIL263,11031−13%

34Richland County, ILIL15,21931−5%

35Ogle County, ILIL51,39931−11%

36DuPage County, ILIL934,29831−7%

37Bureau County, ILIL32,51030−23%

38Adams County, ILIL64,26730−2%

39Morgan County, ILIL32,51530−37%

40Rock Island County, ILIL141,86930−9%

41Marion County, ILIL36,38229−24%

42Perry County, ILIL20,16028−24%

43Cumberland County, ILIL10,20828+55%

44Coles County, ILIL46,60727−25%

45Jefferson County, ILIL36,14727−28%

46LaSalle County, ILIL107,77327−9%

47Ford County, ILIL13,21627+12%

48Franklin County, ILIL36,91627+17%

49Scott County, ILIL4,86626−15%

50Fayette County, ILIL20,79025−55%

51Effingham County, ILIL34,51925−27%

52Schuyler County, ILIL6,65725−39%

53Jersey County, ILIL21,16025+68%

54McLean County, ILIL171,41925−11%

55Marshall County, ILIL11,47325−15%

56Livingston County, ILIL35,05724−7%

57Hancock County, ILIL16,80324−4%

58Saline County, ILIL22,77224−6%

59Clinton County, ILIL37,12824−23%

60De Witt County, ILIL15,11823+21%

61Mason County, ILIL12,41123+39%

62Boone County, ILIL53,56822−38%

63Tazewell County, ILIL130,04922−2%

64Pike County, ILIL14,23122−11%

65Christian County, ILIL33,44321−18%

66Menard County, ILIL11,86321+26%

67McHenry County, ILIL317,75120−6%

68Williamson County, ILIL67,22520−31%

69Macoupin County, ILIL43,74820−40%

70Wayne County, ILIL15,88220+35%

71Greene County, ILIL11,31320+17%

72Washington County, ILIL13,56420−16%

73Shelby County, ILIL20,57619+18%

74Lawrence County, ILIL13,79019−56%

75Edgar County, ILIL16,32319−13%

76Lee County, ILIL32,91419−34%

77Massac County, ILIL13,50219+122%

78Grundy County, ILIL54,05218−17%

79Henry County, ILIL48,09518−32%

80White County, ILIL13,25018−17%

81Clark County, ILIL15,11418+74%

82Monroe County, ILIL34,84018−13%

83Kendall County, ILIL145,47018−15%

84Clay County, ILIL12,79317−41%

85Bond County, ILIL16,95915−62%

86Putnam County, ILIL5,61915+44%

87Union County, ILIL16,65615−9%

88Mercer County, ILIL15,22914−16%

89Calhoun County, ILIL4,30014−70%

90Wabash County, ILIL10,90714−27%

91Moultrie County, ILIL14,37113−33%

92Woodford County, ILIL38,11112−37%

93Pope County, ILIL3,67211−46%

94Hamilton County, ILIL7,85911−37%

95Hardin County, ILIL3,58810−41%

96Jo Daviess County, ILIL21,5948−55%

97Gallatin County, ILIL4,6167−9%

98Edwards County, ILIL5,8986−56%

99Piatt County, ILIL16,7916−67%

100Henderson County, ILIL5,9845−64%

101Stark County, ILIL5,3192+935%

102Jasper County, ILIL9,0320−98%

SHOWING 1–102 OF 102

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

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES