Counties in Wisconsin by population density

Name: Counties in Wisconsin by population density, 2021
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Milwaukee County had the highest population density of 72 counties in 2021, at 1,478.6 inhabitants per km². Iron County had the lowest, at 3.1 inhabitants per km². The median was 19.5 inhabitants per km² and the figure for Wisconsin was 41.9 inhabitants per km². Source: the U.S. Census Bureau.

Highest1,478.6Milwaukee County

Lowest3.1Iron County

Median19.572 counties

Wisconsin41.9History

Top 40 counties, 2021

CSV Chart (SVG)

inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

Rank	Counties	2021 inhabitants per km²	Change on 2020
1	Milwaukee County	1,478.6	-1.5%
2	Waukesha County	287.4	+0.4%
3	Kenosha County	239.3	-0.4%
4	Racine County	228.5	-0.6%
5	Brown County	195.9	0%
6	Dane County	181.3	-0.1%
7	Ozaukee County	153.5	+1.1%
8	Winnebago County	151.6	-0.7%
9	Washington County	123.2	+0.4%
10	Outagamie County	115.9	+0.2%
11	La Crosse County	102	-1.3%
12	Sheboygan County	88.8	-0.3%
13	Rock County	88.3	+0.2%
14	Walworth County	73.2	-0%
15	Eau Claire County	64.2	+0.1%
16	Calumet County	63.8	+0.2%
17	Jefferson County	59.6	-0.5%
18	Fond du Lac County	55.9	-0%
19	Manitowoc County	53.4	+0.2%
20	St. Croix County	50.8	+1.2%
21	Dodge County	39.1	-0.7%
22	Wood County	36	-0.2%
23	Marathon County	34.4	-0.2%
24	Portage County	33.5	-1.4%
25	Sauk County	30.5	-0.1%
26	Columbia County	29.5	-0.1%
27	Pierce County	28	-1.5%
28	Waupaca County	26.8	+0.2%
29	Chippewa County	25.5	+0.4%
30	Green County	24.5	+0.1%
31	Door County	24.4	+1.1%
32	Kewaunee County	23.2	+0.1%
33	Green Lake County	21.3	+1.2%
34	Barron County	20.9	-0.1%
35	Dunn County	20.2	-2%
36	Monroe County	19.8	-0.3%
37	Polk County	19.2	+1%
38	Shawano County	17.6	-0.1%
39	Grant County	17.3	-1.4%
40	Trempealeau County	16.2	-0.3%
41	Waushara County	15.3	+0.9%
42	Oconto County	15.3	+0.9%
43	Vernon County	15.1	+0.7%
44	Juneau County	13.5	-0.1%
45	Marquette County	13.4	+1.2%
46	Oneida County	13.3	+1.1%
47	Douglas County	13	-0.8%
48	Lincoln County	12.5	+0.2%
49	Adams County	12.5	+0.8%
50	Pepin County	12.3	+0.5%
51	Iowa County	12.1	+0.4%
52	Marinette County	11.5	-0.1%
53	Richland County	11.3	-0.4%
54	Clark County	11.1	+0.3%
55	Crawford County	10.9	+0.1%
56	Vilas County	10.6	+1.7%
57	Lafayette County	10.3	+1.3%
58	Langlade County	8.6	0%
59	Jackson County	8.2	-0.9%
60	Washburn County	8.1	+0.8%
61	Taylor County	7.9	+0.1%
62	Burnett County	7.9	+1.1%
63	Buffalo County	7.6	+0.1%
64	Rusk County	6	-0.5%
65	Ashland County	5.9	+0.3%
66	Sawyer County	5.6	+0.6%
67	Menominee County	4.6	+0.8%
68	Price County	4.3	+0.2%
69	Bayfield County	4.3	+0.6%
70	Florence County	3.6	+0.6%
71	Forest County	3.6	+2.7%
72	Iron County	3.1	+0.6%

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 1,478.6 inhabitants per km² in 2021, according to the U.S. Census Bureau.

Which county has the lowest population density?

Iron County, with 3.1 inhabitants per km² in 2021.

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.