THE DOOR COUNTY LAND BRIEF
Land in the
Door Peninsula setting.
Door County has 481.9 square miles of land in Wisconsin. 2 mapped landscape regions meet across Door County: Door Peninsula, Lake Michigan Lacustrine Clay Plain.
This transition between northern forests and southern farming country includes lakes, wetlands and hardwood woodland. Glacial landforms support a mosaic of open land and wooded areas.
Regional context: North Central Hardwood Forests ↗ · Regional mapping across the county footprint
Where the landscape changes
Door County intersects 2 mapped regional units. The largest mapped shares are:
- Door Peninsula97.5%
- Lake Michigan Lacustrine Clay Plain2.5%
Southeastern Wisconsin Till Plains in Door County
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.
Read the regional source ↗Finding your parcel within Door County
The atlas lists 22 cities, towns, townships, and Census communities associated with Door County, including Liberty Grove, Sevastopol, Nasewaupee. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Door County by land and water
The Census records 1,888.3 square miles of water within Door County, or 79.7% of its total area. That share is close to Door County’s 79.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Door County has 285.7 times the land area of nearby Baileys Harbor CDP (1.69 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Brown County, Kewaunee County, Marinette County, Oconto County within Wisconsin. A tract near one of these lines should be matched to the county identifier on its own records.

