Larose stands at the crossroads of Bayou Lafourche and the Intercoastal Canal. The community was called Canal Harang until the first post office was opened around 1890, and it was named for Joseph Felicien Larose, a pharmacist who acted as an unofficial postmaster. A canal dug to give local settlers access to New Orleans markets for oranges, rice, and potatoes encouraged the area’s growth. In 1943, the present Intercoastal Canal was constructed, and instead of farm produce moving along the waterway, it came to carry mostly oil, sulphur, shells, and equipment.