THE JEFFERSON COUNTY LAND BRIEF
Land in the
Southeastern Wisconsin Savannah and Till Plain setting.
Jefferson County has 556.5 square miles of land in Wisconsin. 2 mapped landscape regions meet across Jefferson County: Southeastern Wisconsin Savannah and Till Plain, Kettle Moraines.
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
Jefferson County intersects 2 mapped regional units. The largest mapped shares are:
- Southeastern Wisconsin Savannah and Till Plain96.4%
- Kettle Moraines3.6%
Finding your parcel within Jefferson County
The atlas lists 33 cities, towns, townships, and Census communities associated with Jefferson County, including Jefferson, Koshkonong, Watertown. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jefferson County by land and water
The Census records 26.2 square miles of water within Jefferson County, or 4.5% of its total area. That share is close to Jefferson County’s 4.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jefferson County has 95.4 times the land area of nearby Jefferson city (5.83 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Dane County, Dodge County, Rock County, Walworth County, Waukesha County within Wisconsin. A tract near one of these lines should be matched to the county identifier on its own records.

