RANKING · 1990 CENSUS · 102 SHOWN OF 102

Least racially diverse, Illinois counties · 1990

Illinois counties with the lowest CensusEasy Diversity Score, where most residents share the same 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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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 –

01Schuyler County, ILIL6,6571–

02Cumberland County, ILIL10,2081–

03Shelby County, ILIL20,5761–

04Scott County, ILIL4,8661–

05Piatt County, ILIL16,7911–

06Moultrie County, ILIL14,3711–

07Cass County, ILIL12,4631–

08Menard County, ILIL11,8631–

09Calhoun County, ILIL4,3001–

10Pike County, ILIL14,2311–

11Hamilton County, ILIL7,8592–

12Effingham County, ILIL34,5192–

13Richland County, ILIL15,2192–

14Hancock County, ILIL16,8032–

15Mason County, ILIL12,4112–

16Greene County, ILIL11,3132–

17Franklin County, ILIL36,9162–

18Christian County, ILIL33,4432–

19Clay County, ILIL12,7932–

20Jo Daviess County, ILIL21,5942–

21Jasper County, ILIL9,0322–

22Ford County, ILIL13,2162–

23Clark County, ILIL15,1143–

24Henderson County, ILIL5,9843–

25Edwards County, ILIL5,8983–

26Washington County, ILIL13,5643–

27Woodford County, ILIL38,1113–

28Stark County, ILIL5,3193–

29Crawford County, ILIL18,6483–

30Jersey County, ILIL21,1603–

31Wayne County, ILIL15,8823–

32Tazewell County, ILIL130,0493–

33Edgar County, ILIL16,3233–

34Monroe County, ILIL34,8403–

35Mercer County, ILIL15,2293–

36Gallatin County, ILIL4,6163–

37De Witt County, ILIL15,1183–

38White County, ILIL13,2504–

39Macoupin County, ILIL43,7484–

40Marshall County, ILIL11,4734–

41Wabash County, ILIL10,9074–

42Douglas County, ILIL19,8804–

43Union County, ILIL16,6564–

44Lawrence County, ILIL13,7905–

45Hardin County, ILIL3,5886–

46Iroquois County, ILIL26,1506–

47Perry County, ILIL20,1606–

48Fulton County, ILIL32,9017–

49Grundy County, ILIL54,0527–

50Henry County, ILIL48,0957–

51Warren County, ILIL16,2228–

52Montgomery County, ILIL28,0768–

53Adams County, ILIL64,2678–

54Williamson County, ILIL67,2258–

55Bureau County, ILIL32,5109–

56Fayette County, ILIL20,7909–

57Carroll County, ILIL15,4199–

58Putnam County, ILIL5,6199–

59Coles County, ILIL46,6079–

60Bond County, ILIL16,95910–

61Ogle County, ILIL51,39910–

62McHenry County, ILIL317,75110–

63Saline County, ILIL22,77211–

64Clinton County, ILIL37,12811–

65LaSalle County, ILIL107,77311–

66Kendall County, ILIL145,47013–

67Marion County, ILIL36,38213–

68Morgan County, ILIL32,51513–

69Logan County, ILIL27,18214–

70Lee County, ILIL32,91415–

71Jefferson County, ILIL36,14716–

72McLean County, ILIL171,41916–

73Massac County, ILIL13,50216–

74McDonough County, ILIL25,91617–

75Pope County, ILIL3,67217–

76Stephenson County, ILIL43,22018–

77Boone County, ILIL53,56818–

78Livingston County, ILIL35,05718–

79DeKalb County, ILIL101,83519–

80Knox County, ILIL47,76719–

81Madison County, ILIL263,11019–

82Whiteside County, ILIL54,12119–

83Randolph County, ILIL29,92121–

84Sangamon County, ILIL194,17022–

85Vermilion County, ILIL71,25925–

86DuPage County, ILIL934,29826–

87Brown County, ILIL6,40127–

88Johnson County, ILIL13,36327–

89Macon County, ILIL99,30029–

90Rock Island County, ILIL141,86930–

91Winnebago County, ILIL283,67430–

92Peoria County, ILIL178,55335–

93Jackson County, ILIL52,50135–

94Champaign County, ILIL209,97236–

95Lake County, ILIL719,33936–

96Kankakee County, ILIL105,52537–

97Will County, ILIL712,25338–

98Kane County, ILIL525,75744–

99St. Clair County, ILIL250,70854–

100Pulaski County, ILIL4,82056–

101Alexander County, ILIL4,57056–

102Cook County, ILIL5,194,62573–

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