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 (2023 ACS). This list covers the 102 counties in Illinois that qualify, ranked against each other statewide.

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IllinoisAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPDIVERSITY SCOREVS 2000

01Shelby County, ILIL20,5761−62%

02Schuyler County, ILIL6,6571−60%

03Scott County, ILIL4,8661+3%

04Cumberland County, ILIL10,2081−54%

05Piatt County, ILIL16,7911−50%

06Cass County, ILIL12,4631−93%

07Calhoun County, ILIL4,3001−28%

08Hamilton County, ILIL7,8592−56%

09Moultrie County, ILIL14,3712−19%

10Pike County, ILIL14,2312−71%

11Effingham County, ILIL34,5192−42%

12Menard County, ILIL11,8632−45%

13Richland County, ILIL15,2192−55%

14Mason County, ILIL12,4112−7%

15Franklin County, ILIL36,9162−17%

16Christian County, ILIL33,4432−76%

17Greene County, ILIL11,3132−38%

18Hancock County, ILIL16,8032−7%

19Jasper County, ILIL9,0322+19%

20Clay County, ILIL12,7932−28%

21Jo Daviess County, ILIL21,5943−45%

22Ford County, ILIL13,2163−38%

23Clark County, ILIL15,1143+76%

24Washington County, ILIL13,5643−4%

25Henderson County, ILIL5,9843−5%

26Crawford County, ILIL18,6483−81%

27Edwards County, ILIL5,8983+27%

28Woodford County, ILIL38,1113+2%

29Jersey County, ILIL21,1603−16%

30Stark County, ILIL5,3193+22%

31Edgar County, ILIL16,3233−50%

32Gallatin County, ILIL4,6163+16%

33Wayne County, ILIL15,8824+36%

34De Witt County, ILIL15,1184−29%

35Monroe County, ILIL34,8404+33%

36Tazewell County, ILIL130,0494−39%

37Mercer County, ILIL15,2294−10%

38Macoupin County, ILIL43,7484−2%

39Marshall County, ILIL11,4734+6%

40White County, ILIL13,2504+51%

41Wabash County, ILIL10,9075+15%

42Lawrence County, ILIL13,7905+7%

43Douglas County, ILIL19,8805−47%

44Union County, ILIL16,6566−39%

45Hardin County, ILIL3,5886−45%

46Perry County, ILIL20,1606−72%

47Fulton County, ILIL32,9018−38%

48Henry County, ILIL48,0958−22%

49Iroquois County, ILIL26,1508−31%

50Adams County, ILIL64,2678−20%

51Williamson County, ILIL67,2259−16%

52Montgomery County, ILIL28,0769−27%

53Warren County, ILIL16,2229−22%

54Grundy County, ILIL54,0529−16%

55Fayette County, ILIL20,7909−32%

56Coles County, ILIL46,60710−12%

57Bureau County, ILIL32,51010−29%

58Carroll County, ILIL15,41910+33%

59Bond County, ILIL16,95911−49%

60Saline County, ILIL22,77211−13%

61Clinton County, ILIL37,12812−18%

62Putnam County, ILIL5,61913+41%

63McHenry County, ILIL317,75113−41%

64LaSalle County, ILIL107,77313−24%

65Marion County, ILIL36,38214+5%

66Ogle County, ILIL51,39914−16%

67Morgan County, ILIL32,51514−20%

68Logan County, ILIL27,18215−25%

69Jefferson County, ILIL36,14716−26%

70Massac County, ILIL13,50216+5%

71McLean County, ILIL171,41917−33%

72McDonough County, ILIL25,91617+2%

73Lee County, ILIL32,91417−15%

74Kendall County, ILIL145,47017−23%

75Pope County, ILIL3,67218+53%

76Stephenson County, ILIL43,22018−20%

77Madison County, ILIL263,11020−9%

78Livingston County, ILIL35,05721+8%

79DeKalb County, ILIL101,83521−31%

80Knox County, ILIL47,76721−11%

81Randolph County, ILIL29,92122−14%

82Sangamon County, ILIL194,17022−17%

83Boone County, ILIL53,56825−19%

84Vermilion County, ILIL71,25926−18%

85Brown County, ILIL6,40126−42%

86Whiteside County, ILIL54,12126+13%

87Johnson County, ILIL13,36327−27%

88DuPage County, ILIL934,29828−35%

89Macon County, ILIL99,30029−13%

90Winnebago County, ILIL283,67432−22%

91Rock Island County, ILIL141,86933−12%

92Peoria County, ILIL178,55336−14%

93Jackson County, ILIL52,50136−9%

94Champaign County, ILIL209,97237−16%

95Kankakee County, ILIL105,52538−13%

96Lake County, ILIL719,33941−22%

97Will County, ILIL712,25342−8%

98Kane County, ILIL525,75752−12%

99St. Clair County, ILIL250,70854−5%

100Pulaski County, ILIL4,82056−2%

101Alexander County, ILIL4,57056−6%

102Cook County, ILIL5,194,62578−5%

SHOWING 1–102 OF 102

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

UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES