Assumption Parish is named for the Assumption Roman Catholic Church, the oldest church in Louisiana.
Surrounding Parish Courthouses:
N – Iberville Parish and Ascension Parish
E – Saint James Parish and Lafourche Parish
W – Saint Mary Parish, Saint Martin Parish and Iberia Parish
Created: March 31, 1807 
Parish Seat :
Madewood Plantation 1807 – 1818
Napoleonville 1818 – present
Parish Courthouse – Napoleonville
Location: 4809 Highway 1 / Franklin Avenue
Built: 1896 – 1897
Style: Italianate
Architect: Harrod and Andry of New Orleans
Contractor: M T Lewman and Company of Louisville, Kentucky
Description: The building faces northeast and is a two story white colored stucco structure. The building is located on landscaped grounds in the center of Napoleonville. The building is sheathed in white colored stucco. The northeast front has an arched entrance on the first story with two long vertical windows and an iron balcony on the second story and rising to a clock tower. The roof is hipped. In the interior, there is an “L” shaped floor plan with a central hall on the first story. Decorative features include beaded board wainscoting and molded lintels and transoms. There is an Eastlake style balustrade on the staircase. The courtroom is located on the second story and has exposed ceiling beams and molded chair rail. The building houses the District Court of the 23rd Judicial District. The building has a one story north wing and a two south wing with additions constructed in 1960’s and 1985. The building is connected to the 1885 jail on the southwest side. On the southwest side is the modern Parish Police Jury Building.
See: The contractor M T Lewman and Company of Louisville, Kentucky.
See: National Register of Historic Places – Assumption Parish Courthouse
History: The parish was created in 1807 and Madewood Plantation was the site of the first courthouse in 1807 which stood just across the Lafourche Bayou on the Madewood Plantation. In 1818, Napoleonville was selected as the parish seat. The second courthouse was a Greek style structure built in 1818 and burned. The jail was built in 1885. The third and present courthouse was constructed in 1896 to 1897 at a cost of $23,132.
Parish Police Jury Building – Napoleonville
Location: 4809 Highway 1 / Franklin Avenue
Built: Unknown
Style: Modern
Architect: Unknown
Contractor: Unknown
Description: The building faces northeast and is a two story white colored stucco structure. The building is located on landscaped grounds in the center of Napoleonville on the northwest side of the courthouse. The building contains the Parish Council Chamber on the first story..
Parish Courthouse – Napoleonville
Parish Courthouse Annex – Napoleonville
Parish Police Jury Building – Napoleonville
Photos taken 2011 and 2019