Assumption Parish, Louisiana

Assumption Parish lies in south Louisiana, right in the heart of Cajun country. The parish seat is Napoleonville, a small community with a distinctive local character and deep roots in Louisiana’s history.

Bayou Lafourche winds through the parish, creating the classic waterways-and-wetlands landscape associated with south Louisiana. Lake Verret, one of the parish’s largest natural lakes, is a popular destination for fishing and boating, while the surrounding swamps and bayous offer opportunities to experience the region’s unique environment.

For visitors passing through, Madewood Plantation House offers a glimpse into the area’s historic past. With its preserved architecture and connection to Louisiana’s plantation-era history, the site adds another layer to the character of Assumption Parish, where the landscape and traditions reflect generations of local history.

CategoryDetails
Parish NameAssumption Parish
Parish SeatNapoleonville
EtymologyNamed after the Assumption Roman Catholic Church, which was established in the early 19th century
Cities, Towns, and CommunitiesNapoleonville, Pierre Part, Labadieville, Belle Rose, Paincourtville, Bayou L’Ourse, Supreme
Interstates and HighwaysLA-1, LA-70, LA-308
FIPS Code22-007
Total Area (Land and Water)365 square miles (339 sq mi land, 26 sq mi water)
Adjacent Parishes (and Direction)Iberville Parish (North), Ascension Parish (North), St. James Parish (Northeast), Lafourche Parish (East), Terrebonne Parish (Southeast), St. Mary Parish (Southwest), Iberia Parish (Northwest), St. Martin Parish (West)
Time ZoneCentral Time Zone (CT)
StateLouisiana
Coordinates29.9427° N, 91.0541° W
Major LandmarksMadewood Plantation House, Assumption Parish Courthouse, Lake Verret, Bayou Pierre Part Swamp Tours, St. Elizabeth Catholic Church
PopulationApproximately 21,000
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