THE WASHINGTON COUNTY LAND BRIEF
Land in the
Kettle Moraines setting.
Washington County has 430.6 square miles of land in Wisconsin. 2 mapped landscape regions meet across Washington County: Kettle Moraines, Southeastern Wisconsin Savannah and Till Plain.
Glacial till plains support a transition between hardwood forest, oak savanna and prairie landscapes. Rolling farmland and woodland reflect this meeting of ecological regions in southeastern Wisconsin.
Regional context: Southeastern Wisconsin Till Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Washington County intersects 2 mapped regional units. The largest mapped shares are:
- Kettle Moraines69.4%
- Southeastern Wisconsin Savannah and Till Plain30.6%
Finding your parcel within Washington County
The atlas lists 22 cities, towns, townships, and Census communities associated with Washington County, including Milwaukee, Farmington, Addison. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Washington County by land and water
The Census records 5.02 square miles of water within Washington County, or 1.2% of its total area. That share is close to Washington County’s 1.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Washington County has 14 times the land area of nearby Polk town (30.8 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Dodge County, Fond du Lac County, Milwaukee County, Ozaukee County, Sheboygan County, Waukesha County within Wisconsin. A tract near one of these lines should be matched to the county identifier on its own records.

