THE ORLEANS PARISH LAND BRIEF
Land in the
Deltaic Coastal Marshes and Barrier Islands setting.
Orleans Parish has 169.6 square miles of land in Louisiana. 2 mapped landscape regions meet across Orleans Parish: Deltaic Coastal Marshes and Barrier Islands, Southern Holocene Meander Belts.
The Mississippi's broad alluvial plain includes river terraces, swales and natural levees. Small changes in elevation distinguish local settings within this generally flat river landscape.
Regional context: Mississippi Alluvial Plain ↗ · Regional mapping across the county footprint
Where the landscape changes
Orleans Parish intersects 2 mapped regional units. The largest mapped shares are:
- Deltaic Coastal Marshes and Barrier Islands79.4%
- Southern Holocene Meander Belts20.6%
Finding your parcel within Orleans Parish
The atlas lists 1 cities, towns, townships, and Census communities associated with Orleans Parish, including New Orleans. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Orleans Parish by land and water
The Census records 180.3 square miles of water within Orleans Parish, or 51.5% of its total area. That share is close to Orleans Parish’s 51.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
The Census boundary meets Jefferson Parish, Plaquemines Parish, St. Bernard Parish, St. Tammany Parish within Louisiana. A tract near one of these lines should be matched to the county identifier on its own records.

