THE WILLIAMSON COUNTY LAND BRIEF
Land in the
Outer Nashville Basin setting.
Williamson County has 582.9 square miles of land in Tennessee. 3 mapped landscape regions meet across Williamson County: Outer Nashville Basin, Western Highland Rim, Inner Nashville Basin.
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
Williamson County intersects 3 mapped regional units. The largest mapped shares are:
- Outer Nashville Basin56.2%
- Western Highland Rim31.6%
- Inner Nashville Basin12.2%
Finding your parcel within Williamson County
The atlas lists 8 cities, towns, townships, and Census communities associated with Williamson County, including Franklin, Brentwood, Smyrna. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Williamson County by land and water
The Census records 1.16 square miles of water within Williamson County, or 0.2% of its total area. That share is close to Williamson County’s 0.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Williamson County has 13.1 times the land area of nearby Franklin city (44.5 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cheatham County, Davidson County, Dickson County, Hickman County, Marshall County, Maury County, Rutherford County within Tennessee. A tract near one of these lines should be matched to the county identifier on its own records.

