THE DEKALB COUNTY LAND BRIEF
Land in the
Outer Nashville Basin setting.
DeKalb County has 304.4 square miles of land in Tennessee. 2 mapped landscape regions meet across DeKalb County: Outer Nashville Basin, Eastern Highland Rim.
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
DeKalb County intersects 2 mapped regional units. The largest mapped shares are:
- Outer Nashville Basin53.5%
- Eastern Highland Rim46.5%
Finding your parcel within DeKalb County
The atlas lists 4 cities, towns, townships, and Census communities associated with DeKalb County, including Smithville, Alexandria, Liberty. The list includes overlapping geography types and does not divide the county into exclusive service areas.
DeKalb County by land and water
The Census records 24.6 square miles of water within DeKalb County, or 7.5% of its total area. That share is close to DeKalb County’s 7.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, DeKalb County has 51.7 times the land area of nearby Smithville city (5.89 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cannon County, Putnam County, Smith County, Warren County, White County, Wilson County within Tennessee. A tract near one of these lines should be matched to the county identifier on its own records.

