THE ST. MARTIN PARISH LAND BRIEF
Land in the
Inland Swamps setting.
St. Martin Parish has 737.5 square miles of land in Louisiana. 4 mapped landscape regions meet across St. Martin Parish: Inland Swamps, Southern Holocene Meander Belts, Lafayette Loess Plains, among others.
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. Martin Parish intersects 4 mapped regional units. The largest mapped shares are:
- Inland Swamps71.5%
- Southern Holocene Meander Belts25%
- Lafayette Loess Plains1.8%
- Southern Backswamps1.6%
Western Gulf Coastal Plain in St. Martin Parish
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.
Read the regional source ↗Finding your parcel within St. Martin Parish
The atlas lists 10 cities, towns, townships, and Census communities associated with St. Martin Parish, including Broussard, Breaux Bridge, Cade. The list includes overlapping geography types and does not divide the county into exclusive service areas.
St. Martin Parish by land and water
The Census records 79.2 square miles of water within St. Martin Parish, or 9.7% of its total area. That share is close to St. Martin Parish’s 9.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. Martin Parish has 240.9 times the land area of nearby Catahoula CDP (3.06 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Assumption Parish, Iberia Parish, Iberville Parish, Lafayette Parish, Pointe Coupee Parish, St. Landry Parish, St. Mary Parish within Louisiana. A tract near one of these lines should be matched to the county identifier on its own records.

