RANKING · 1990 CENSUS · 102 SHOWN OF 102

Most racially diverse, Illinois counties · 1990

Illinois counties ranked by the CensusEasy Diversity Score (0 to 100), the chance two random residents are of a different race or ethnicity (1990 ACS). This list covers the 102 counties in Illinois that qualify, ranked against each other statewide. The median across all 102 is 8.

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IllinoisAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

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

RANKPLACESTATEPOPDIVERSITY SCOREVS –

01Cook County, ILIL5,194,62573–

02Alexander County, ILIL4,57056–

03Pulaski County, ILIL4,82056–

04St. Clair County, ILIL250,70854–

05Kane County, ILIL525,75744–

06Will County, ILIL712,25338–

07Kankakee County, ILIL105,52537–

08Lake County, ILIL719,33936–

09Champaign County, ILIL209,97236–

10Jackson County, ILIL52,50135–

11Peoria County, ILIL178,55335–

12Winnebago County, ILIL283,67430–

13Rock Island County, ILIL141,86930–

14Macon County, ILIL99,30029–

15Johnson County, ILIL13,36327–

16Brown County, ILIL6,40127–

17DuPage County, ILIL934,29826–

18Vermilion County, ILIL71,25925–

19Sangamon County, ILIL194,17022–

20Randolph County, ILIL29,92121–

21Whiteside County, ILIL54,12119–

22Madison County, ILIL263,11019–

23Knox County, ILIL47,76719–

24DeKalb County, ILIL101,83519–

25Livingston County, ILIL35,05718–

26Boone County, ILIL53,56818–

27Stephenson County, ILIL43,22018–

28Pope County, ILIL3,67217–

29McDonough County, ILIL25,91617–

30Massac County, ILIL13,50216–

31McLean County, ILIL171,41916–

32Jefferson County, ILIL36,14716–

33Lee County, ILIL32,91415–

34Logan County, ILIL27,18214–

35Morgan County, ILIL32,51513–

36Marion County, ILIL36,38213–

37Kendall County, ILIL145,47013–

38LaSalle County, ILIL107,77311–

39Clinton County, ILIL37,12811–

40Saline County, ILIL22,77211–

41McHenry County, ILIL317,75110–

42Ogle County, ILIL51,39910–

43Bond County, ILIL16,95910–

44Coles County, ILIL46,6079–

45Putnam County, ILIL5,6199–

46Carroll County, ILIL15,4199–

47Fayette County, ILIL20,7909–

48Bureau County, ILIL32,5109–

49Williamson County, ILIL67,2258–

50Adams County, ILIL64,2678–

51Montgomery County, ILIL28,0768–

52Warren County, ILIL16,2228–

53Henry County, ILIL48,0957–

54Grundy County, ILIL54,0527–

55Fulton County, ILIL32,9017–

56Perry County, ILIL20,1606–

57Iroquois County, ILIL26,1506–

58Hardin County, ILIL3,5886–

59Lawrence County, ILIL13,7905–

60Union County, ILIL16,6564–

61Douglas County, ILIL19,8804–

62Wabash County, ILIL10,9074–

63Marshall County, ILIL11,4734–

64Macoupin County, ILIL43,7484–

65White County, ILIL13,2504–

66De Witt County, ILIL15,1183–

67Gallatin County, ILIL4,6163–

68Mercer County, ILIL15,2293–

69Monroe County, ILIL34,8403–

70Edgar County, ILIL16,3233–

71Tazewell County, ILIL130,0493–

72Wayne County, ILIL15,8823–

73Jersey County, ILIL21,1603–

74Crawford County, ILIL18,6483–

75Stark County, ILIL5,3193–

76Woodford County, ILIL38,1113–

77Washington County, ILIL13,5643–

78Edwards County, ILIL5,8983–

79Henderson County, ILIL5,9843–

80Clark County, ILIL15,1143–

81Ford County, ILIL13,2162–

82Jasper County, ILIL9,0322–

83Jo Daviess County, ILIL21,5942–

84Clay County, ILIL12,7932–

85Christian County, ILIL33,4432–

86Franklin County, ILIL36,9162–

87Greene County, ILIL11,3132–

88Mason County, ILIL12,4112–

89Hancock County, ILIL16,8032–

90Richland County, ILIL15,2192–

91Effingham County, ILIL34,5192–

92Hamilton County, ILIL7,8592–

93Pike County, ILIL14,2311–

94Calhoun County, ILIL4,3001–

95Menard County, ILIL11,8631–

96Cass County, ILIL12,4631–

97Moultrie County, ILIL14,3711–

98Piatt County, ILIL16,7911–

99Scott County, ILIL4,8661–

100Shelby County, ILIL20,5761–

101Cumberland County, ILIL10,2081–

102Schuyler County, ILIL6,6571–

SHOWING 1–102 OF 102

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

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS