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 5,223,719
2 DuPage County 931,743
3 Lake County 703,619
4 Will County 688,697
5 Kane County 530,839
6 McHenry County 307,789
7 Winnebago County 286,174
8 Madison County 265,670
9 St. Clair County 263,463
10 Champaign County 209,448
11 Sangamon County 197,661
12 Peoria County 184,463
13 McLean County 173,219
14 Rock Island County 145,275
15 Tazewell County 133,852
16 Kendall County 124,626
17 Kankakee County 111,061
18 LaSalle County 110,401
19 Macon County 106,512
20 DeKalb County 104,200
21 Vermilion County 78,407
22 Williamson County 67,299
23 Adams County 66,427
24 Jackson County 58,551
25 Whiteside County 56,396
26 Boone County 53,606
27 Coles County 51,736
28 Ogle County 51,328
29 Knox County 50,999
30 Grundy County 50,509
31 Henry County 49,464
32 Macoupin County 45,719
33 Stephenson County 45,433
34 Franklin County 39,127
35 Woodford County 38,817
36 Jefferson County 38,169
37 Marion County 38,084
38 Clinton County 37,628
39 Livingston County 36,324
40 Fulton County 35,418
41 Lee County 34,527
42 Morgan County 34,426
43 Effingham County 34,174
44 Monroe County 33,936
45 Bureau County 33,381
46 Christian County 33,231
47 Randolph County 32,546
48 McDonough County 30,875
49 Logan County 29,207
50 Montgomery County 29,009
51 Iroquois County 28,169
52 Saline County 24,231
53 Jersey County 22,069
54 Jo Daviess County 21,834
55 Shelby County 21,832
56 Fayette County 21,724
57 Perry County 21,384
58 Douglas County 19,714
59 Crawford County 19,088
60 Hancock County 18,112
61 Edgar County 17,539
62 Warren County 17,338
63 Union County 17,127
64 Bond County 16,712
65 Wayne County 16,487
66 Piatt County 16,427
67 Lawrence County 16,189
68 De Witt County 16,042
69 Richland County 15,881
70 Clark County 15,836
71 Pike County 15,754
72 Mercer County 15,693
73 Moultrie County 14,703
74 Carroll County 14,562
75 Massac County 14,430
76 Washington County 14,155
77 White County 14,025
78 Mason County 13,778
79 Ford County 13,398
80 Clay County 13,338
81 Greene County 13,218
82 Cass County 12,665
83 Johnson County 12,602
84 Menard County 12,367
85 Marshall County 11,794
86 Wabash County 11,573
87 Cumberland County 10,865
88 Jasper County 9,598
89 Hamilton County 8,221
90 Schuyler County 7,064
91 Henderson County 6,884
92 Brown County 6,675
93 Alexander County 6,532
94 Edwards County 6,507
95 Putnam County 5,746
96 Pulaski County 5,611
97 Stark County 5,500
98 Gallatin County 5,157
99 Scott County 5,047
100 Calhoun County 4,858
101 Pope County 4,249
102 Hardin County 4,009

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2018. U.S. Census Bureau, Population Division. Web. May 2019. http://www.census.gov/.

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/.

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