County Maps US

Waukesha County, Wisconsin

A county in Wisconsin, ranked 3 of 72 by population.

CountyFIPS 55133

Within Wisconsin
Waukesha County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

Download SVGFull Wisconsin map downloads

Population
417,210
+9,704 (+2.4%) since 2020
Land area
549.7
square miles. A further 5.3% of the total area is water
Population density
759
people per square mile, computed rather than published
County seat
Waukesha
Seat of county government.
Established
1846
179 years ago
Largest city
Waukesha city
Population 70,872.

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 Waukesha 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 Waukesha 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 792 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 Waukesha 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
Population417,2103rd of 72185th of 3,144
Land area549.7 sq mi55th of 721,899th of 3,144
Population density759 per sq mi2nd of 72201st of 3,144
Median household income$106,0761st of 72119th of 3,143

Full data for Waukesha County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population417,210Vintage 2025 Population Estimates
Population in 2020407,506Vintage 2025 Population Estimates
2020 estimates base?406,989Vintage 2025 Population Estimates
Land area549.7 sq mi2025 Gazetteer Files
Water area30.8 sq mi2025 Gazetteer Files
Total area580.5 sq mi2025 Gazetteer Files
Population density?759 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$106,076American Community Survey 2020-2024 5-Year Estimates
Median home value$398,200American Community Survey 2020-2024 5-Year Estimates
Median age43.5American Community Survey 2020-2024 5-Year Estimates
Households168,658American Community Survey 2020-2024 5-Year Estimates
Housing units175,591American 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
-236
3,536 births, 3,772 deaths
Net migration
+1,672
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 7 areas bordering Waukesha 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
Jefferson CountyWisconsin24 mi86,505
Milwaukee CountyWisconsin24 mi924,216
Washington CountyWisconsin18 mi139,238
Racine CountyWisconsin12 mi198,919
Walworth CountyWisconsin12 mi106,127
Dodge CountyWisconsin6.0 mi89,097
Ozaukee CountyWisconsina single point94,346

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

Side by side

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.