Ranking of Illinois Counties By Population in 2014

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2014, the Population for Illinois was 12.89M. Among all Illinois counties, Cook County had the highest population (5.25M), followed by DuPage County (933.48K), and Lake County (704.36K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Illinois counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Illinois Counties By Population in 2014
Cook
DuPage
Lake
Will
Kane
McHenry
Winnebago
Madison
St. Clair
Champaign
Ranking of Illinois Counties By Population in 2014
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Rank County Population
1 Cook County 5254108
2 DuPage County 933480
3 Lake County 704359
4 Will County 685123
5 Kane County 525476
6 McHenry County 307425
7 Winnebago County 288770
8 Madison County 266662
9 St. Clair County 266061
10 Champaign County 208068
11 Sangamon County 199252
12 Peoria County 187572
13 McLean County 174166
14 Rock Island County 147090
15 Tazewell County 135392
16 Kendall County 121385
17 Kankakee County 111916
18 LaSalle County 111650
19 Macon County 108562
20 DeKalb County 104593
21 Vermilion County 79811
22 Williamson County 67439
23 Adams County 66983
24 Jackson County 59386
25 Whiteside County 57037
26 Boone County 53702
27 Coles County 52552
28 Knox County 51945
29 Ogle County 51944
30 Grundy County 50281
31 Henry County 49841
32 Stephenson County 46280
33 Macoupin County 46216
34 Franklin County 39456
35 Woodford County 39068
36 Marion County 38573
37 Jefferson County 38390
38 Clinton County 37637
39 Livingston County 37043
40 Fulton County 35996
41 Lee County 34912
42 Morgan County 34684
43 Effingham County 34115
44 Bureau County 33858
45 Christian County 33824
46 Monroe County 33608
47 Randolph County 33088
48 McDonough County 31811
49 Logan County 29660
50 Montgomery County 29450
51 Iroquois County 28725
52 Saline County 24496
53 Jersey County 22500
54 Jo Daviess County 22341
55 Shelby County 22102
56 Fayette County 22088
57 Perry County 21543
58 Douglas County 19898
59 Crawford County 19290
60 Hancock County 18326
61 Edgar County 17827
62 Warren County 17705
63 Union County 17404
64 Bond County 17076
65 Wayne County 16610
66 Lawrence County 16564
67 Piatt County 16414
68 De Witt County 16216
69 Clark County 16060
70 Richland County 16019
71 Pike County 15953
72 Mercer County 15902
73 Carroll County 14783
74 Massac County 14756
75 Moultrie County 14754
76 Washington County 14389
77 White County 14265
78 Mason County 14102
79 Ford County 13539
80 Clay County 13441
81 Greene County 13416
82 Cass County 13079
83 Johnson County 12882
84 Menard County 12513
85 Marshall County 11966
86 Wabash County 11604
87 Cumberland County 10931
88 Jasper County 9633
89 Hamilton County 8313
90 Schuyler County 7262
91 Alexander County 7084
92 Henderson County 7018
93 Brown County 6836
94 Edwards County 6631
95 Putnam County 5831
96 Pulaski County 5802
97 Stark County 5602
98 Gallatin County 5279
99 Scott County 5171
100 Calhoun County 4923
101 Pope County 4382
102 Hardin County 4146