THE GRAND ISLE LAND BRIEF
Land in the
Deltaic Coastal Marshes and Barrier Islands setting.
Grand Isle town has 6.4 square miles of land in Jefferson Parish. Its Census reference point is in Deltaic Coastal Marshes and Barrier Islands, within Mississippi Alluvial Plain.
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 ↗ · Classification at the Census reference point
Grand Isle and Jefferson Parish
Grand Isle is associated with Jefferson Parish in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Grand Isle by land and water
The Census records 1.77 square miles of water within Grand Isle, or 21.6% of its total area. It is 31.5 percentage points lower than the 53.1% recorded for Jefferson Parish. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Grand Isle town has 2.6 times the land area of nearby Golden Meadow town (2.45 square miles). These areas describe boundaries, not comparable property prices.

