Ranking of Illinois Counties By Percentage of Population that were Black or African American Alone from Census 2020

Updated on February 25, 2023.

According to the data from the United States 2020 decennial Census for Illinois counties, in April 2020, among all Illinois counties, Alexander County had the highest percentage of its population that identified their race as Black or African American Alone (30.86%), followed by St. Clair County (29.75%), and Pulaski County (28.23%).

The chart below shows the top 10 counties, and the table below shows the ranking of all Illinois counties based on the percentage of the population that identified as Black or African American Alone.

You can see similar ranking information for other states. You can also see similar rankings of counties for other racial groups as well as for the different ethnicities in Illinois.

Ranking of Illinois Counties By Percentage of Pop. that were Black or African American Alone from Census 2020
Alexander
St. Clair
Pulaski
Cook
Peoria
Macon
Brown
Kankakee
Jackson
Vermilion
Ranking of Illinois Counties By Percentage of Pop. that were Black or African American Alone from Census 2020
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Rank County Black Alone % of County Pop.
1 Alexander County 30.86
2 St. Clair County 29.75
3 Pulaski County 28.23
4 Cook County 22.86
5 Peoria County 18.71
6 Macon County 18.32
7 Brown County 16.88
8 Kankakee County 14.49
9 Jackson County 14.34
10 Vermilion County 14.05
11 Champaign County 13.93
12 Winnebago County 13.72
13 Sangamon County 13.22
14 Will County 11.63
15 Rock Island County 11.48
16 Johnson County 10.75
17 Stephenson County 9.98
18 Madison County 9.36
19 Lawrence County 9.20
20 DeKalb County 8.92
21 Knox County 8.92
22 McLean County 8.77
23 Perry County 8.03
24 Randolph County 7.94
25 Jefferson County 7.66
26 Kendall County 7.60
27 Lake County 6.86
28 Bond County 6.44
29 Massac County 6.26
30 Morgan County 6.03
31 McDonough County 5.62
32 Cass County 5.56
33 Lee County 5.47
34 Logan County 5.43
35 Kane County 5.33
36 DuPage County 4.88
37 Coles County 4.45
38 Carroll County 4.42
39 Williamson County 4.27
40 Schuyler County 4.19
41 Marion County 4.01
42 Adams County 3.81
43 Fayette County 3.71
44 Warren County 3.49
45 Fulton County 3.35
46 Crawford County 3.33
47 Montgomery County 3.27
48 Clinton County 3.12
49 Livingston County 3.11
50 Saline County 2.95
51 LaSalle County 2.40
52 Boone County 2.33
53 Henry County 2.19
54 Grundy County 1.65
55 Whiteside County 1.51
56 McHenry County 1.38
57 Union County 1.32
58 Tazewell County 1.28
59 Christian County 1.15
60 Pope County 1.14
61 Ogle County 1.12
62 Iroquois County 0.85
63 Bureau County 0.83
64 Macoupin County 0.82
65 Marshall County 0.75
66 Jersey County 0.73
67 Woodford County 0.72
68 De Witt County 0.71
69 Washington County 0.71
70 Menard County 0.68
71 White County 0.66
72 Moultrie County 0.58
73 Ford County 0.56
74 Wayne County 0.56
75 Gallatin County 0.53
76 Jo Daviess County 0.52
77 Hamilton County 0.51
78 Wabash County 0.51
79 Piatt County 0.50
80 Pike County 0.50
81 Edgar County 0.49
82 Mercer County 0.49
83 Richland County 0.49
84 Franklin County 0.48
85 Henderson County 0.47
86 Putnam County 0.46
87 Effingham County 0.45
88 Hancock County 0.41
89 Mason County 0.39
90 Hardin County 0.36
91 Clark County 0.35
92 Edwards County 0.35
93 Douglas County 0.34
94 Monroe County 0.34
95 Stark County 0.33
96 Shelby County 0.31
97 Clay County 0.29
98 Cumberland County 0.27
99 Jasper County 0.25
100 Greene County 0.19
101 Calhoun County 0.16
102 Scott County 0.10