THE JEFFERSON DAVIS PARISH LAND BRIEF
Land in the
Northern Humid Gulf Coastal Prairies setting.
Jefferson Davis Parish has 651.5 square miles of land in Louisiana. 5 mapped landscape regions meet across Jefferson Davis Parish: Northern Humid Gulf Coastal Prairies, Floodplains and Low Terraces, Texas-Louisiana Coastal Marshes, among others.
Low coastal plains extend along the western Gulf, contrasting with more irregular inland country. Grassland was the principal natural cover, with river corridors and coastal features adding local variation.
Regional context: Western Gulf Coastal Plain ↗ · Regional mapping across the county footprint
Where the landscape changes
Jefferson Davis Parish intersects 5 mapped regional units. The largest mapped shares are:
- Northern Humid Gulf Coastal Prairies89.6%
- Floodplains and Low Terraces5.4%
- Texas-Louisiana Coastal Marshes1.9%
- Flatwoods1.7%
- Floodplains and Low Terraces1.3%
South Central Plains in Jefferson Davis Parish
The Piney Woods occupy irregular plains at the western edge of the southern forest belt. Pine and hardwood landscapes alternate with wider river corridors such as the Red River valley.
Read the regional source ↗Finding your parcel within Jefferson Davis Parish
The atlas lists 7 cities, towns, townships, and Census communities associated with Jefferson Davis Parish, including Jennings, Welsh, Lake Arthur. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jefferson Davis Parish by land and water
The Census records 7.21 square miles of water within Jefferson Davis Parish, or 1.1% of its total area. That share is close to Jefferson Davis Parish’s 1.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jefferson Davis Parish has 103.1 times the land area of nearby Welsh town (6.32 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Acadia Parish, Allen Parish, Beauregard Parish, Calcasieu Parish, Cameron Parish, Evangeline Parish, Vermilion Parish within Louisiana. A tract near one of these lines should be matched to the county identifier on its own records.

