THE SUMNER COUNTY LAND BRIEF
Land in the
Outer Nashville Basin setting.
Sumner County has 529.5 square miles of land in Tennessee. 4 mapped landscape regions meet across Sumner County: Outer Nashville Basin, Eastern Highland Rim, Western Pennyroyal Karst Plain, among others.
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
Sumner County intersects 4 mapped regional units. The largest mapped shares are:
- Outer Nashville Basin59.1%
- Eastern Highland Rim24.2%
- Western Pennyroyal Karst Plain16.6%
- Western Highland Rim0.1%
Finding your parcel within Sumner County
The atlas lists 18 cities, towns, townships, and Census communities associated with Sumner County, including Gallatin, Hendersonville, Portland. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sumner County by land and water
The Census records 13.8 square miles of water within Sumner County, or 2.5% of its total area. That share is close to Sumner County’s 2.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sumner County has 263.9 times the land area of nearby Graball CDP (2.01 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Davidson County, Macon County, Robertson County, Trousdale County, Wilson County within Tennessee. A tract near one of these lines should be matched to the county identifier on its own records.

