THE DEARBORN COUNTY LAND BRIEF
Land in the
Outer Bluegrass setting.
Dearborn County has 305.1 square miles of land in Indiana. 2 mapped landscape regions meet across Dearborn County: Outer Bluegrass, Pre-Wisconsinan Drift Plains.
Open hills, irregular plains and tablelands are developed on limestone and other sedimentary rocks. Oak-hickory woodland, local prairie and cedar-glade settings contribute to this diverse inland plateau.
Regional context: Interior Plateau ↗ · Regional mapping across the county footprint
Where the landscape changes
Dearborn County intersects 2 mapped regional units. The largest mapped shares are:
- Outer Bluegrass66.1%
- Pre-Wisconsinan Drift Plains33.9%
Eastern Corn Belt Plains in Dearborn County
Rolling glacial till plains are interrupted by end moraines and areas of older, more dissected deposits. The historical landscape had more tree cover than the Central Corn Belt to the west.
Read the regional source ↗Finding your parcel within Dearborn County
The atlas lists 24 cities, towns, townships, and Census communities associated with Dearborn County, including Manchester, Sparta, Miller. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Dearborn County by land and water
The Census records 2.32 square miles of water within Dearborn County, or 0.8% of its total area. That share is close to Dearborn County’s 0.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Dearborn County has 204.8 times the land area of nearby Manchester CDP (1.49 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Franklin County, Ohio County, Ripley County within Indiana. A tract near one of these lines should be matched to the county identifier on its own records.

