County Maps US

Washington County, Wisconsin

A county in Wisconsin, ranked 11 of 72 by population.

CountyFIPS 55131

Within Wisconsin
Washington County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks West Bend, the county seat, located via the 2025 Census Gazetteer.

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Population
139,238
+2,432 (+1.8%) since 2020
Land area
430.6
square miles. A further 1.2% of the total area is water
Population density
323
people per square mile, computed rather than published
County seat
West Bend
Seat of county government.
Established
1845
180 years ago
Largest city
West Bend city
Population 32,268.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Washington County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Washington County, Wisconsin from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 646 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Washington County ranks

Position among the 72 counties of Wisconsin, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn WisconsinNationally
Population139,23811th of 72485th of 3,144
Land area430.6 sq mi63rd of 722,363rd of 3,144
Population density323 per sq mi9th of 72413th of 3,144
Median household income$96,3594th of 72206th of 3,143

Full data for Washington County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population139,238Vintage 2025 Population Estimates
Population in 2020136,806Vintage 2025 Population Estimates
2020 estimates base?136,770Vintage 2025 Population Estimates
Land area430.6 sq mi2025 Gazetteer Files
Water area5.0 sq mi2025 Gazetteer Files
Total area435.7 sq mi2025 Gazetteer Files
Population density?323 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$96,359American Community Survey 2020-2024 5-Year Estimates
Median home value$344,800American Community Survey 2020-2024 5-Year Estimates
Median age43.8American Community Survey 2020-2024 5-Year Estimates
Households57,070American Community Survey 2020-2024 5-Year Estimates
Housing units59,380American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-43
1,280 births, 1,323 deaths
Net migration
+531
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Washington County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Ozaukee CountyWisconsin25 mi94,346
Dodge CountyWisconsin25 mi89,097
Waukesha CountyWisconsin18 mi417,210
Fond du Lac CountyWisconsin12 mi104,669
Sheboygan CountyWisconsin6.0 mi118,047
Milwaukee CountyWisconsina single point924,216

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 72 counties of Wisconsin

Open the interactive Wisconsin county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.