THE JEFFERSON PARISH LAND BRIEF
Land in the
Deltaic Coastal Marshes and Barrier Islands setting.
Jefferson Parish has 300.9 square miles of land in Louisiana. 2 mapped landscape regions meet across Jefferson 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
Jefferson Parish intersects 2 mapped regional units. The largest mapped shares are:
- Deltaic Coastal Marshes and Barrier Islands85.8%
- Southern Holocene Meander Belts14.1%
Finding your parcel within Jefferson Parish
The atlas lists 21 cities, towns, townships, and Census communities associated with Jefferson Parish, including Metairie, Kenner, Marrero. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jefferson Parish by land and water
The Census records 341.2 square miles of water within Jefferson Parish, or 53.1% of its total area. That share is close to Jefferson Parish’s 53.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jefferson Parish has 62.1 times the land area of nearby Lafitte CDP (4.84 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Lafourche Parish, Orleans Parish, Plaquemines Parish, St. Charles Parish, St. John the Baptist Parish, St. Tammany Parish within Louisiana. A tract near one of these lines should be matched to the county identifier on its own records.

