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 5,238,541
2 DuPage County 931,826
3 Lake County 704,476
4 Will County 687,727
5 Kane County 529,402
6 McHenry County 308,043
7 Winnebago County 287,512
8 Madison County 266,153
9 St. Clair County 264,433
10 Champaign County 207,946
11 Sangamon County 198,134
12 Peoria County 186,145
13 McLean County 173,231
14 Rock Island County 146,205
15 Tazewell County 134,695
16 Kendall County 122,933
17 LaSalle County 111,151
18 Kankakee County 110,801
19 Macon County 107,587
20 DeKalb County 104,473
21 Vermilion County 79,207
22 Williamson County 67,477
23 Adams County 66,787
24 Jackson County 59,115
25 Whiteside County 56,823
26 Boone County 53,638
27 Coles County 52,540
28 Ogle County 51,619
29 Knox County 51,374
30 Grundy County 50,333
31 Henry County 49,649
32 Macoupin County 45,960
33 Stephenson County 45,839
34 Franklin County 39,302
35 Woodford County 38,942
36 Jefferson County 38,358
37 Marion County 38,305
38 Clinton County 37,640
39 Livingston County 36,812
40 Fulton County 35,733
41 Lee County 34,670
42 Morgan County 34,442
43 Effingham County 34,164
44 Monroe County 33,739
45 Bureau County 33,619
46 Christian County 33,562
47 Randolph County 32,829
48 McDonough County 31,597
49 Logan County 29,488
50 Montgomery County 29,173
51 Iroquois County 28,457
52 Saline County 24,430
53 Jersey County 22,215
54 Jo Daviess County 22,046
55 Fayette County 21,980
56 Shelby County 21,906
57 Perry County 21,467
58 Douglas County 19,830
59 Crawford County 19,214
60 Hancock County 18,264
61 Edgar County 17,603
62 Warren County 17,429
63 Union County 17,267
64 Bond County 17,034
65 Wayne County 16,569
66 Lawrence County 16,457
67 Piatt County 16,433
68 De Witt County 16,176
69 Richland County 15,953
70 Pike County 15,930
71 Clark County 15,924
72 Mercer County 15,794
73 Moultrie County 14,711
74 Carroll County 14,704
75 Massac County 14,594
76 Washington County 14,260
77 White County 14,186
78 Mason County 13,904
79 Ford County 13,470
80 Clay County 13,393
81 Greene County 13,311
82 Johnson County 12,899
83 Cass County 12,880
84 Menard County 12,416
85 Marshall County 11,925
86 Wabash County 11,568
87 Cumberland County 10,899
88 Jasper County 9,608
89 Hamilton County 8,259
90 Schuyler County 7,181
91 Henderson County 6,927
92 Brown County 6,791
93 Alexander County 6,776
94 Edwards County 6,570
95 Putnam County 5,771
96 Pulaski County 5,691
97 Stark County 5,551
98 Gallatin County 5,226
99 Scott County 5,109
100 Calhoun County 4,897
101 Pope County 4,360
102 Hardin County 4,161

United States Census Bureau. B01001 SEX BY AGE, 2017 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 6 December 2018. http://www.census.gov/.

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