Data / Rankings / Population density / Counties in Wisconsin

Counties in Wisconsin by population density, 2025

Milwaukee County had the highest population density of 72 counties in 2025, at 1,477.9 inhabitants per km². Iron County had the lowest, at 3.1 inhabitants per km². The median was 19.7 inhabitants per km² and the figure for Wisconsin was 42.6 inhabitants per km². Source: the U.S. Census Bureau.

Highest1,477.9Milwaukee County
Lowest3.1Iron County
Median19.772 counties
Wisconsin42.6History

Top 40 counties, 2025

CSVChart (SVG)

Milwaukee CountyMilwaukee County: 1,477.9 inhabitants per km²1,477.9Waukesha CountyWaukesha County: 293 inhabitants per km²293Kenosha CountyKenosha County: 239.3 inhabitants per km²239.3Racine CountyRacine County: 230.9 inhabitants per km²230.9Brown CountyBrown County: 200.9 inhabitants per km²200.9Dane CountyDane County: 190.5 inhabitants per km²190.5Ozaukee CountyOzaukee County: 156.3 inhabitants per km²156.3Winnebago CountyWinnebago County: 154.7 inhabitants per km²154.7Washington CountyWashington County: 124.8 inhabitants per km²124.8Outagamie CountyOutagamie County: 118.6 inhabitants per km²118.6La Crosse CountyLa Crosse County: 103.7 inhabitants per km²103.7Rock CountyRock County: 89.5 inhabitants per km²89.5Sheboygan CountySheboygan County: 89.1 inhabitants per km²89.1Walworth CountyWalworth County: 73.8 inhabitants per km²73.8Eau Claire CountyEau Claire County: 66 inhabitants per km²66Calumet CountyCalumet County: 65.5 inhabitants per km²65.5Jefferson CountyJefferson County: 60 inhabitants per km²60Fond du Lac CountyFond du Lac County: 56.2 inhabitants per km²56.2Manitowoc CountyManitowoc County: 53.5 inhabitants per km²53.5St. Croix CountySt. Croix County: 52.5 inhabitants per km²52.5Dodge CountyDodge County: 39.3 inhabitants per km²39.3Wood CountyWood County: 36.1 inhabitants per km²36.1Marathon CountyMarathon County: 34.8 inhabitants per km²34.8Portage CountyPortage County: 34.7 inhabitants per km²34.7Sauk CountySauk County: 30.9 inhabitants per km²30.9Columbia CountyColumbia County: 29.3 inhabitants per km²29.3Pierce CountyPierce County: 29.3 inhabitants per km²29.3Waupaca CountyWaupaca County: 26.6 inhabitants per km²26.6Chippewa CountyChippewa County: 25.9 inhabitants per km²25.9Green CountyGreen County: 24.6 inhabitants per km²24.6Door CountyDoor County: 24.5 inhabitants per km²24.5Kewaunee CountyKewaunee County: 23.4 inhabitants per km²23.4Green Lake CountyGreen Lake County: 21.3 inhabitants per km²21.3Dunn CountyDunn County: 21 inhabitants per km²21Barron CountyBarron County: 20.8 inhabitants per km²20.8Monroe CountyMonroe County: 20 inhabitants per km²20Polk CountyPolk County: 19.3 inhabitants per km²19.3Shawano CountyShawano County: 18 inhabitants per km²18Grant CountyGrant County: 17.6 inhabitants per km²17.6Trempealeau CountyTrempealeau County: 16.4 inhabitants per km²16.4
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1Milwaukee County1,477.9-0%
2Waukesha County293+0.3%
3Kenosha County239.30%
4Racine County230.9+0.2%
5Brown County200.9+0.6%
6Dane County190.5+0.7%
7Ozaukee County156.3+0.7%
8Winnebago County154.7+0.5%
9Washington County124.8+0.4%
10Outagamie County118.6+0.6%
11La Crosse County103.7+0.3%
12Rock County89.5+0.5%
13Sheboygan County89.1-0%
14Walworth County73.80%
15Eau Claire County66+0.4%
16Calumet County65.5+0.4%
17Jefferson County60-0%
18Fond du Lac County56.2-0%
19Manitowoc County53.5-0.2%
20St. Croix County52.5+0.6%
21Dodge County39.3+0.2%
22Wood County36.1-0.3%
23Marathon County34.8+0.2%
24Portage County34.7+0.3%
25Sauk County30.9+0.1%
26Columbia County29.3+0.2%
27Pierce County29.3+0.5%
28Waupaca County26.6+0.1%
29Chippewa County25.9+0.5%
30Green County24.6-0%
31Door County24.5+0.1%
32Kewaunee County23.4-0.1%
33Green Lake County21.3-0.1%
34Dunn County21+0.5%
35Barron County20.8-0.5%
36Monroe County20+0.1%
37Polk County19.3+0.1%
38Shawano County18+0.4%
39Grant County17.6+0.1%
40Trempealeau County16.4+0.8%
41Oconto County15.6+0.5%
42Waushara County15.6+0.6%
43Vernon County15.3+0.2%
44Marquette County13.5+0.6%
45Juneau County13.40%
46Oneida County13.2-0.1%
47Douglas County13+0.2%
48Adams County13+0.9%
49Pepin County12.5-0.4%
50Lincoln County12.50%
51Iowa County12.1-0.1%
52Marinette County11.7+0.4%
53Richland County11.2-0.5%
54Clark County11.2+0.2%
55Crawford County10.8-0.1%
56Vilas County10.70%
57Lafayette County10.7+0.8%
58Langlade County8.7+0.2%
59Washburn County8.3+0.4%
60Jackson County8.2-0.2%
61Burnett County8.1+0.2%
62Taylor County8+0.1%
63Buffalo County7.6-0.6%
64Ashland County60%
65Rusk County6+0.2%
66Sawyer County5.8+0.3%
67Menominee County4.5-0.7%
68Bayfield County4.40%
69Price County4.3-0.9%
70Florence County3.8+1.4%
71Forest County3.6+0.6%
72Iron County3.1-1.1%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Milwaukee County, with 1,477.9 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Iron County, with 3.1 inhabitants per km² in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Wisconsin: more rankings