THE ST. JOHN THE BAPTIST PARISH LAND BRIEF
Land in the
Inland Swamps setting.
St. John the Baptist Parish has 214.5 square miles of land in Louisiana. 3 mapped landscape regions meet across St. John the Baptist Parish: Inland Swamps, 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
St. John the Baptist Parish intersects 3 mapped regional units. The largest mapped shares are:
- Inland Swamps42.5%
- Deltaic Coastal Marshes and Barrier Islands38.4%
- Southern Holocene Meander Belts19.1%
Finding your parcel within St. John the Baptist Parish
The atlas lists 6 cities, towns, townships, and Census communities associated with St. John the Baptist Parish, including Laplace, Reserve, Garyville. The list includes overlapping geography types and does not divide the county into exclusive service areas.
St. John the Baptist Parish by land and water
The Census records 195.5 square miles of water within St. John the Baptist Parish, or 47.7% of its total area. That share is close to St. John the Baptist Parish’s 47.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. John the Baptist Parish has 10.3 times the land area of nearby Laplace CDP (20.9 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Ascension Parish, Jefferson Parish, Lafourche Parish, Livingston Parish, St. Charles Parish, St. James Parish, St. Tammany Parish, Tangipahoa Parish within Louisiana. A tract near one of these lines should be matched to the county identifier on its own records.

