| Rank |
County |
Households |
| 1 |
Cook County, Illinois
|
1,934,771
|
| 2 |
DuPage County, Illinois
|
335,651
|
| 3 |
Lake County, Illinois
|
239,947
|
| 4 |
Will County, Illinois
|
221,722
|
| 5 |
Kane County, Illinois
|
169,528
|
| 6 |
Winnebago County, Illinois
|
113,015
|
| 7 |
McHenry County, Illinois
|
108,361
|
| 8 |
Madison County, Illinois
|
106,792
|
| 9 |
St Clair County, Illinois
|
103,498
|
| 10 |
Sangamon County, Illinois
|
82,422
|
| 11 |
Champaign County, Illinois
|
78,900
|
| 12 |
Peoria County, Illinois
|
75,416
|
| 13 |
McLean County, Illinois
|
63,431
|
| 14 |
Rock Island County, Illinois
|
60,527
|
| 15 |
Tazewell County, Illinois
|
54,144
|
| 16 |
LaSalle County, Illinois
|
45,000
|
| 17 |
Macon County, Illinois
|
44,568
|
| 18 |
Kankakee County, Illinois
|
41,086
|
| 19 |
DeKalb County, Illinois
|
38,011
|
| 20 |
Kendall County, Illinois
|
36,856
|
| 21 |
Vermilion County, Illinois
|
31,979
|
| 22 |
Williamson County, Illinois
|
26,764
|
| 23 |
Adams County, Illinois
|
26,722
|
| 24 |
Jackson County, Illinois
|
23,718
|
| 25 |
Whiteside County, Illinois
|
23,603
|
| 26 |
Knox County, Illinois
|
21,704
|
| 27 |
Coles County, Illinois
|
21,035
|
| 28 |
Ogle County, Illinois
|
20,663
|
| 29 |
Henry County, Illinois
|
20,467
|
| 30 |
Stephenson County, Illinois
|
19,515
|
| 31 |
Macoupin County, Illinois
|
19,407
|
| 32 |
Grundy County, Illinois
|
18,297
|
| 33 |
Boone County, Illinois
|
17,960
|
| 34 |
Marion County, Illinois
|
16,108
|
| 35 |
Franklin County, Illinois
|
16,100
|
| 36 |
Jefferson County, Illinois
|
15,314
|
| 37 |
Fulton County, Illinois
|
14,717
|
| 38 |
Livingston County, Illinois
|
14,484
|
| 39 |
Bureau County, Illinois
|
14,404
|
| 40 |
Woodford County, Illinois
|
14,083
|
| 41 |
Christian County, Illinois
|
14,063
|
| 42 |
Clinton County, Illinois
|
14,022
|
| 43 |
Morgan County, Illinois
|
13,993
|
| 44 |
Lee County, Illinois
|
13,721
|
| 45 |
Effingham County, Illinois
|
13,496
|
| 46 |
McDonough County, Illinois
|
12,834
|
| 47 |
Monroe County, Illinois
|
12,311
|
| 48 |
Randolph County, Illinois
|
12,022
|
| 49 |
Iroquois County, Illinois
|
11,884
|
| 50 |
Montgomery County, Illinois
|
11,667
|
| 51 |
Logan County, Illinois
|
10,992
|
| 52 |
Saline County, Illinois
|
10,414
|
| 53 |
Jo Daviess County, Illinois
|
9,862
|
| 54 |
Shelby County, Illinois
|
8,968
|
| 55 |
Jersey County, Illinois
|
8,650
|
| 56 |
Fayette County, Illinois
|
8,296
|
| 57 |
Perry County, Illinois
|
8,252
|
| 58 |
Hancock County, Illinois
|
7,977
|
| 59 |
Edgar County, Illinois
|
7,881
|
| 60 |
Crawford County, Illinois
|
7,815
|
| 61 |
Douglas County, Illinois
|
7,589
|
| 62 |
Wayne County, Illinois
|
7,241
|
| 63 |
Carroll County, Illinois
|
6,893
|
| 64 |
Mercer County, Illinois
|
6,889
|
| 65 |
Warren County, Illinois
|
6,854
|
| 66 |
Union County, Illinois
|
6,787
|
| 67 |
De Witt County, Illinois
|
6,728
|
| 68 |
Richland County, Illinois
|
6,687
|
| 69 |
Clark County, Illinois
|
6,676
|
| 70 |
Pike County, Illinois
|
6,650
|
| 71 |
Piatt County, Illinois
|
6,507
|
| 72 |
Bond County, Illinois
|
6,434
|
| 73 |
Mason County, Illinois
|
6,426
|
| 74 |
White County, Illinois
|
6,327
|
| 75 |
Massac County, Illinois
|
6,251
|
| 76 |
Washington County, Illinois
|
6,013
|
| 77 |
Lawrence County, Illinois
|
5,818
|
| 78 |
Greene County, Illinois
|
5,809
|
| 79 |
Ford County, Illinois
|
5,709
|
| 80 |
Moultrie County, Illinois
|
5,611
|
| 81 |
Clay County, Illinois
|
5,535
|
| 82 |
Cass County, Illinois
|
5,082
|
| 83 |
Marshall County, Illinois
|
5,061
|
| 84 |
Menard County, Illinois
|
4,959
|
| 85 |
Wabash County, Illinois
|
4,752
|
| 86 |
Johnson County, Illinois
|
4,298
|
| 87 |
Cumberland County, Illinois
|
4,163
|
| 88 |
Jasper County, Illinois
|
3,985
|
| 89 |
Hamilton County, Illinois
|
3,470
|
| 90 |
Alexander County, Illinois
|
3,168
|
| 91 |
Henderson County, Illinois
|
3,155
|
| 92 |
Schuyler County, Illinois
|
3,081
|
| 93 |
Edwards County, Illinois
|
2,799
|
| 94 |
Putnam County, Illinois
|
2,482
|
| 95 |
Pulaski County, Illinois
|
2,457
|
| 96 |
Gallatin County, Illinois
|
2,382
|
| 97 |
Stark County, Illinois
|
2,371
|
| 98 |
Scott County, Illinois
|
2,145
|
| 99 |
Brown County, Illinois
|
2,128
|
| 100 |
Calhoun County, Illinois
|
2,084
|
| 101 |
Pope County, Illinois
|
1,880
|
| 102 |
Hardin County, Illinois
|
1,856
|