Ranking of Wisconsin Counties By Population with Unclassified Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.06M people in Wisconsin with Unclassified ancestry. Among all Wisconsin counties, Milwaukee County had the highest population with Unclassified ancestry (136.32K), followed by Dane County (89.13K), and Waukesha County (69.07K).

The chart and table below shows the top 10 counties with high number of people with Unclassified ancestry.

You can see similar information for other states and for other ancestry groups in Wisconsin.

Data Source: US Census Bureau.
Ranking of Wisconsin Counties By Population with Unclassified Ancestry in 2021
Milwaukee County
Dane County
Waukesha County
Brown County
Outagamie County
Winnebago County
Rock County
Kenosha County
Racine County
Washington County
Ranking of Wisconsin Counties By Population with Unclassified Ancestry in 2021
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Rank County Population
1 Milwaukee County 136322
2 Dane County 89127
3 Waukesha County 69074
4 Brown County 50544
5 Outagamie County 35461
6 Winnebago County 34104
7 Rock County 33278
8 Kenosha County 32290
9 Racine County 31787
10 Washington County 25162
11 Eau Claire County 22298
12 La Crosse County 22002
13 Marathon County 21849
14 Walworth County 19805
15 Fond du Lac County 18492
16 Sheboygan County 18478
17 St. Croix County 17687
18 Chippewa County 17172
19 Dodge County 16229
20 Jefferson County 16153
21 Grant County 15935
22 Ozaukee County 15223
23 Wood County 14049
24 Manitowoc County 13110
25 Columbia County 12440
26 Sauk County 12415
27 Douglas County 11441
28 Monroe County 11277
29 Waupaca County 10088
30 Barron County 9670
31 Pierce County 9398
32 Marinette County 9384
33 Dunn County 9161
34 Calumet County 9141
35 Portage County 9121
36 Clark County 8885
37 Polk County 8624
38 Oconto County 8401
39 Shawano County 8250
40 Green County 7058
41 Oneida County 6134
42 Juneau County 6130
43 Iowa County 6028
44 Vernon County 5406
45 Lafayette County 5240
46 Taylor County 5163
47 Jackson County 5142
48 Lincoln County 5039
49 Trempealeau County 4961
50 Door County 4472
51 Adams County 4430
52 Waushara County 4286
53 Green Lake County 3729
54 Vilas County 3711
55 Rusk County 3674
56 Richland County 3626
57 Crawford County 3609
58 Kewaunee County 3538
59 Sawyer County 3432
60 Langlade County 3413
61 Washburn County 3398
62 Ashland County 3353
63 Burnett County 3043
64 Marquette County 2595
65 Buffalo County 2472
66 Bayfield County 2256
67 Price County 2092
68 Forest County 1891
69 Pepin County 1697
70 Florence County 1060
71 Iron County 951
72 Menominee County 369