Illinois / Counties by Population

Illinois Counties by Population

The data is from the US Census. Below are 102 Illinois counties ranked 1 through 102 . You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

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Rank County Population
1 Cook County 5,150,233
2 DuPage County 922,921
3 Lake County 696,535
4 Will County 690,743
5 Kane County 532,403
6 McHenry County 307,774
7 Winnebago County 282,572
8 Madison County 262,966
9 St. Clair County 259,686
10 Champaign County 209,689
11 Sangamon County 194,672
12 Peoria County 179,179
13 McLean County 171,517
14 Rock Island County 141,879
15 Tazewell County 131,803
16 Kendall County 128,990
17 Kankakee County 109,862
18 LaSalle County 108,669
19 DeKalb County 104,897
20 Macon County 104,009
21 Vermilion County 75,758
22 Williamson County 66,597
23 Adams County 65,435
24 Jackson County 56,750
25 Whiteside County 55,175
26 Boone County 53,544
27 Grundy County 51,054
28 Ogle County 50,643
29 Coles County 50,621
30 Knox County 49,699
31 Henry County 48,913
32 Macoupin County 44,926
33 Stephenson County 44,498
34 Franklin County 38,469
35 Woodford County 38,459
36 Jefferson County 37,684
37 Clinton County 37,562
38 Marion County 37,205
39 Livingston County 35,648
40 Monroe County 34,637
41 Fulton County 34,340
42 Lee County 34,096
43 Effingham County 34,008
44 Morgan County 33,658
45 Bureau County 32,628
46 Christian County 32,304
47 Randolph County 31,782
48 McDonough County 29,682
49 Logan County 28,618
50 Montgomery County 28,414
51 Iroquois County 27,114
52 Saline County 23,491
53 Jersey County 21,773
54 Shelby County 21,634
55 Fayette County 21,336
56 Jo Daviess County 21,235
57 Perry County 20,916
58 Douglas County 19,465
59 Crawford County 18,667
60 Hancock County 17,708
61 Edgar County 17,161
62 Warren County 16,844
63 Union County 16,653
64 Bond County 16,426
65 Piatt County 16,344
66 Wayne County 16,215
67 Lawrence County 15,678
68 De Witt County 15,638
69 Pike County 15,561
70 Richland County 15,513
71 Clark County 15,441
72 Mercer County 15,437
73 Moultrie County 14,501
74 Carroll County 14,305
75 Washington County 13,887
76 Massac County 13,772
77 White County 13,537
78 Mason County 13,359
79 Clay County 13,184
80 Greene County 12,969
81 Ford County 12,961
82 Johnson County 12,417
83 Menard County 12,196
84 Cass County 12,147
85 Wabash County 11,520
86 Marshall County 11,438
87 Cumberland County 10,766
88 Jasper County 9,610
89 Hamilton County 8,116
90 Schuyler County 6,768
91 Henderson County 6,646
92 Brown County 6,578
93 Edwards County 6,395
94 Alexander County 5,761
95 Putnam County 5,739
96 Stark County 5,342
97 Pulaski County 5,335
98 Scott County 4,951
99 Gallatin County 4,828
100 Calhoun County 4,739
101 Pope County 4,177
102 Hardin County 3,821

United States Census Bureau. B01001 SEX BY AGE, 2018 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 19 December 2019. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2019. U.S. Census Bureau, Population Division. Web. May 2020. http://www.census.gov/.

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