THE DUVAL COUNTY LAND BRIEF
Land in the
Sea Island Flatwoods setting.
Duval County has 762.7 square miles of land in Florida. 2 mapped landscape regions meet across Duval County: Sea Island Flatwoods, Sea Islands/Coastal Marsh.
Low plains mingle with barrier islands, lagoons, marshes and inland lake districts. Coastal and inland settings vary substantially within this warm southeastern landscape.
Regional context: Southern Coastal Plain ↗ · Regional mapping across the county footprint
Where the landscape changes
Duval County intersects 2 mapped regional units. The largest mapped shares are:
- Sea Island Flatwoods81.2%
- Sea Islands/Coastal Marsh18.7%
Finding your parcel within Duval County
The atlas lists 5 cities, towns, townships, and Census communities associated with Duval County, including Jacksonville, Jacksonville Beach, Atlantic Beach. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Duval County by land and water
The Census records 155.8 square miles of water within Duval County, or 17% of its total area. That share is close to Duval County’s 17%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Duval County has 1 times the land area of nearby Jacksonville city (747.3 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Baker County, Clay County, Nassau County, St. Johns County within Florida. A tract near one of these lines should be matched to the county identifier on its own records.

