| Rank |
County |
Population (2012) |
| 1 |
Milwaukee County, Wisconsin
|
955,205
|
| 2 |
Dane County, Wisconsin
|
503,523
|
| 3 |
Waukesha County, Wisconsin
|
392,292
|
| 4 |
Brown County, Wisconsin
|
253,032
|
| 5 |
Racine County, Wisconsin
|
194,797
|
| 6 |
Outagamie County, Wisconsin
|
178,816
|
| 7 |
Winnebago County, Wisconsin
|
168,794
|
| 8 |
Kenosha County, Wisconsin
|
167,936
|
| 9 |
Rock County, Wisconsin
|
160,418
|
| 10 |
Marathon County, Wisconsin
|
134,735
|
| 11 |
Washington County, Wisconsin
|
132,661
|
| 12 |
La Crosse County, Wisconsin
|
116,461
|
| 13 |
Sheboygan County, Wisconsin
|
115,009
|
| 14 |
Walworth County, Wisconsin
|
102,851
|
| 15 |
Fond du Lac County, Wisconsin
|
101,843
|
| 16 |
Eau Claire County, Wisconsin
|
100,677
|
| 17 |
Dodge County, Wisconsin
|
88,415
|
| 18 |
Ozaukee County, Wisconsin
|
86,823
|
| 19 |
St Croix County, Wisconsin
|
85,242
|
| 20 |
Jefferson County, Wisconsin
|
84,498
|
| 21 |
Manitowoc County, Wisconsin
|
80,671
|
| 22 |
Wood County, Wisconsin
|
74,424
|
| 23 |
Portage County, Wisconsin
|
70,433
|
| 24 |
Chippewa County, Wisconsin
|
62,922
|
| 25 |
Sauk County, Wisconsin
|
62,597
|
| 26 |
Columbia County, Wisconsin
|
56,539
|
| 27 |
Waupaca County, Wisconsin
|
52,131
|
| 28 |
Grant County, Wisconsin
|
51,087
|
| 29 |
Calumet County, Wisconsin
|
49,634
|
| 30 |
Barron County, Wisconsin
|
45,733
|
| 31 |
Monroe County, Wisconsin
|
45,100
|
| 32 |
Dunn County, Wisconsin
|
44,072
|
| 33 |
Douglas County, Wisconsin
|
43,785
|
| 34 |
Polk County, Wisconsin
|
43,610
|
| 35 |
Shawano County, Wisconsin
|
41,607
|
| 36 |
Marinette County, Wisconsin
|
41,563
|
| 37 |
Pierce County, Wisconsin
|
40,814
|
| 38 |
Oconto County, Wisconsin
|
37,442
|
| 39 |
Green County, Wisconsin
|
36,909
|
| 40 |
Oneida County, Wisconsin
|
35,714
|
| 41 |
Clark County, Wisconsin
|
34,435
|
| 42 |
Vernon County, Wisconsin
|
30,260
|
| 43 |
Trempealeau County, Wisconsin
|
29,297
|
| 44 |
Lincoln County, Wisconsin
|
28,392
|
| 45 |
Door County, Wisconsin
|
27,817
|
| 46 |
Juneau County, Wisconsin
|
26,631
|
| 47 |
Waushara County, Wisconsin
|
24,461
|
| 48 |
Iowa County, Wisconsin
|
23,807
|
| 49 |
Vilas County, Wisconsin
|
21,338
|
| 50 |
Adams County, Wisconsin
|
20,679
|
| 51 |
Kewaunee County, Wisconsin
|
20,624
|
| 52 |
Taylor County, Wisconsin
|
20,486
|
| 53 |
Jackson County, Wisconsin
|
20,485
|
| 54 |
Langlade County, Wisconsin
|
19,646
|
| 55 |
Green Lake County, Wisconsin
|
19,039
|
| 56 |
Richland County, Wisconsin
|
17,818
|
| 57 |
Lafayette County, Wisconsin
|
16,853
|
| 58 |
Sawyer County, Wisconsin
|
16,581
|
| 59 |
Crawford County, Wisconsin
|
16,560
|
| 60 |
Ashland County, Wisconsin
|
15,992
|
| 61 |
Washburn County, Wisconsin
|
15,826
|
| 62 |
Burnett County, Wisconsin
|
15,382
|
| 63 |
Marquette County, Wisconsin
|
15,205
|
| 64 |
Bayfield County, Wisconsin
|
15,099
|
| 65 |
Rusk County, Wisconsin
|
14,316
|
| 66 |
Price County, Wisconsin
|
13,869
|
| 67 |
Buffalo County, Wisconsin
|
13,333
|
| 68 |
Forest County, Wisconsin
|
9,206
|
| 69 |
Pepin County, Wisconsin
|
7,390
|
| 70 |
Iron County, Wisconsin
|
5,934
|
| 71 |
Florence County, Wisconsin
|
4,482
|
| 72 |
Menominee County, Wisconsin
|
4,340
|