THE JO DAVIESS COUNTY LAND BRIEF
Land in the
Blufflands and Coulees setting.
Jo Daviess County has 600.9 square miles of land in Illinois. 4 mapped landscape regions meet across Jo Daviess County: Blufflands and Coulees, Savanna Section, Rock River Hills, among others.
Deeply cut valleys divide a bedrock plateau with windblown soil on many uplands. Glaciers had less influence here than in neighboring regions, leaving a distinctly hilly landscape.
Regional context: Driftless Area ↗ · Regional mapping across the county footprint
Where the landscape changes
Jo Daviess County intersects 4 mapped regional units. The largest mapped shares are:
- Blufflands and Coulees47.8%
- Savanna Section45.1%
- Rock River Hills6.8%
- Rock River Drift Plain0.2%
Central Corn Belt Plains in Jo Daviess County
Glaciated plains historically supported tallgrass prairie mixed with oak and hickory woodland. Dark prairie soils and broad farming landscapes distinguish much of the Central Corn Belt.
Read the regional source ↗Southeastern Wisconsin Till Plains in Jo Daviess 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 Jo Daviess County
The atlas lists 35 cities, towns, townships, and Census communities associated with Jo Daviess County, including Hanover, Guilford, Stockton. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jo Daviess County by land and water
The Census records 17.7 square miles of water within Jo Daviess County, or 2.9% of its total area. That share is close to Jo Daviess County’s 2.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jo Daviess County has 651.8 times the land area of nearby Elizabeth village (0.92 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Carroll County, Stephenson County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

