Population of Illinois 2021

POPULATION

78% of the population are white and 15% are black. About 20,000 Indians still live in Illinois today. In the 1980s, a large wave of immigrants came into the country, mostly from Asia and Latin America. A Polish minority lives in Chicago.

Top Counties by Population in Illinois

Rank County Name Population Population Density (per kmĀ²)
1 Cook County 5,180,504 2,118.82
2 DuPage County 928,600 1,096.34
3 Lake County 700,843 611.02
4 Will County 692,321 320.07
5 Kane County 534,227 397.49
6 McHenry County 308,581 197.56
7 Winnebago County 284,092 213.76
8 Madison County 264,472 142.65
9 St. Clair County 261,070 153.39
10 Champaign County 209,994 81.39
11 Sangamon County 195,359 86.90
12 Peoria County 180,632 112.82
13 McLean County 172,839 56.41
14 Rock Island County 143,488 129.74
15 Tazewell County 132,339 79.10
16 Kendall County 127,926 154.31
17 Kankakee County 110,035 62.84
18 LaSalle County 109,441 37.22
19 Macon County 104,723 69.72
20 DeKalb County 104,154 63.74
21 Vermilion County 76,817 33.03
22 Williamson County 67,067 61.64
23 Adams County 65,702 29.68
24 Jackson County 57,430 37.96
25 Whiteside County 55,637 31.40
26 Boone County 53,588 73.91
27 Grundy County 50,983 47.08
28 Ogle County 50,934 25.95
29 Coles County 50,896 38.67
30 Knox County 50,123 27.04
31 Henry County 49,101 23.06
32 Macoupin County 45,324 20.30
33 Stephenson County 44,764 30.64
34 Franklin County 38,712 36.62
35 Woodford County 38,474 28.19
36 Jefferson County 37,831 25.58
37 Clinton County 37,650 30.66
38 Marion County 37,631 25.41
39 Livingston County 35,772 13.24
40 Fulton County 34,855 15.56
41 Monroe County 34,346 34.45
42 Lee County 34,234 18.26
43 Effingham County 34,219 27.64
44 Morgan County 33,987 23.10
45 Bureau County 33,004 14.66
46 Christian County 32,672 17.80
47 Randolph County 32,117 21.57
48 McDonough County 29,966 19.64
49 Logan County 28,936 18.07
50 Montgomery County 28,612 15.71
51 Iroquois County 27,615 9.55
52 Saline County 23,917 24.36
53 Jersey County 21,858 22.86
54 Shelby County 21,752 11.08
55 Fayette County 21,427 11.56
56 Jo Daviess County 21,377 13.76
57 Perry County 21,185 18.55
58 Douglas County 19,490 18.10
59 Crawford County 18,818 16.41
60 Hancock County 17,855 8.69
61 Edgar County 17,371 10.76
62 Warren County 17,043 12.14
63 Union County 16,852 15.75
64 Bond County 16,641 16.91
65 Piatt County 16,407 14.43
66 Wayne County 16,343 8.85
67 DeWitt County 15,780 15.35
68 Lawrence County 15,776 16.38
69 Richland County 15,774 16.92
70 Pike County 15,622 7.26
71 Mercer County 15,612 10.74
72 Clark County 15,607 12.02
73 Moultrie County 14,728 16.97
74 Carroll County 14,323 12.42
75 Massac County 14,091 22.95
76 Washington County 14,006 9.62
77 White County 13,676 10.69
78 Mason County 13,576 9.72
79 Ford County 13,275 10.57
80 Clay County 13,264 10.94
81 Greene County 13,055 9.29
82 Johnson County 12,467 14.04
83 Menard County 12,299 15.13
84 Cass County 12,271 12.64
85 Wabash County 11,560 20.00
86 Marshall County 11,545 11.55
87 Cumberland County 10,819 12.10
88 Jasper County 9,622 7.52
89 Hamilton County 8,174 7.27
90 Schuyler County 6,918 6.11
91 Henderson County 6,720 6.86
92 Brown County 6,567 8.31
93 Edwards County 6,403 11.14
94 Alexander County 6,071 9.97
95 Putnam County 5,751 13.89
96 Pulaski County 5,474 10.63
97 Stark County 5,438 7.29
98 Gallatin County 5,069 6.08
99 Scott County 4,937 7.63
100 Calhoun County 4,813 7.35
101 Pope County 4,223 4.43
102 Hardin County 3,921 8.56

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