THE GWINNETT COUNTY LAND BRIEF
Land in the
Southern Outer Piedmont setting.
Gwinnett County has 431.1 square miles of land in Georgia. 2 mapped landscape regions meet across Gwinnett County: Southern Outer Piedmont, Southern Inner Piedmont.
The Piedmont is a belt of irregular plains and hills between the Appalachians and the coastal plain. A complex mixture of older rocks underlies its pine and hardwood woodland landscapes.
Regional context: Piedmont ↗ · Regional mapping across the county footprint
Where the landscape changes
Gwinnett County intersects 2 mapped regional units. The largest mapped shares are:
- Southern Outer Piedmont80%
- Southern Inner Piedmont20%
Finding your parcel within Gwinnett County
The atlas lists 19 cities, towns, townships, and Census communities associated with Gwinnett County, including Mulberry, Buford, Peachtree Corners. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Gwinnett County by land and water
The Census records 6.05 square miles of water within Gwinnett County, or 1.4% of its total area. That share is close to Gwinnett County’s 1.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Gwinnett County has 31.2 times the land area of nearby Lawrenceville city (13.8 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Barrow County, DeKalb County, Forsyth County, Fulton County, Hall County, Jackson County, Rockdale County, Walton County within Georgia. A tract near one of these lines should be matched to the county identifier on its own records.

