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 5,198,275
2 DuPage County 929,060
3 Lake County 701,473
4 Will County 689,315
5 Kane County 531,376
6 McHenry County 307,714
7 Winnebago County 284,819
8 Madison County 264,776
9 St. Clair County 262,338
10 Champaign County 209,922
11 Sangamon County 196,861
12 Peoria County 182,770
13 McLean County 172,578
14 Rock Island County 143,873
15 Tazewell County 133,195
16 Kendall County 126,054
17 Kankakee County 110,637
18 LaSalle County 109,737
19 Macon County 105,528
20 DeKalb County 104,366
21 Vermilion County 77,563
22 Williamson County 67,102
23 Adams County 66,085
24 Jackson County 57,977
25 Whiteside County 56,016
26 Boone County 53,537
27 Coles County 51,353
28 Ogle County 51,025
29 Grundy County 50,666
30 Knox County 50,508
31 Henry County 49,267
32 Macoupin County 45,463
33 Stephenson County 45,093
34 Franklin County 38,923
35 Woodford County 38,700
36 Jefferson County 37,985
37 Marion County 37,743
38 Clinton County 37,634
39 Livingston County 36,040
40 Fulton County 35,092
41 Lee County 34,389
42 Morgan County 34,247
43 Monroe County 34,168
44 Effingham County 34,137
45 Bureau County 33,122
46 Christian County 32,931
47 Randolph County 32,295
48 McDonough County 30,479
49 Logan County 29,003
50 Montgomery County 28,828
51 Iroquois County 27,812
52 Saline County 23,994
53 Jersey County 21,937
54 Shelby County 21,737
55 Jo Daviess County 21,588
56 Fayette County 21,565
57 Perry County 21,251
58 Douglas County 19,623
59 Crawford County 18,972
60 Hancock County 17,983
61 Edgar County 17,407
62 Warren County 17,146
63 Union County 16,968
64 Bond County 16,589
65 Wayne County 16,402
66 Piatt County 16,401
67 Lawrence County 16,033
68 De Witt County 15,932
69 Richland County 15,766
70 Clark County 15,716
71 Pike County 15,672
72 Mercer County 15,589
73 Moultrie County 14,641
74 Carroll County 14,466
75 Massac County 14,219
76 Washington County 14,058
77 White County 13,868
78 Mason County 13,621
79 Clay County 13,287
80 Ford County 13,270
81 Greene County 13,132
82 Johnson County 12,494
83 Cass County 12,493
84 Menard County 12,306
85 Marshall County 11,679
86 Wabash County 11,546
87 Cumberland County 10,836
88 Jasper County 9,594
89 Hamilton County 8,176
90 Schuyler County 6,953
91 Henderson County 6,809
92 Brown County 6,628
93 Edwards County 6,455
94 Alexander County 6,260
95 Putnam County 5,721
96 Pulaski County 5,510
97 Stark County 5,447
98 Gallatin County 5,064
99 Scott County 5,005
100 Calhoun County 4,830
101 Pope County 4,203
102 Hardin County 3,939

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/.

United States Census Bureau. B01001 SEX BY AGE, 2019 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 10 December 2020. http://www.census.gov/.

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