Des Allemands is an unincorporated community and census-designated place (CDP) in Lafourche and St. Charles parishes in the southeastern part of the U.S. state of Louisiana. The population was 2,505 at the 2010 census. The town, known as the "Catfish Capital of the Universe", is along the Bayou des Allemands, which is the boundary of Lafourche and St. Charles parishes. Lac des Allemands is located northwest of the town. The ZIP code for Des Allemands is 70030.
The St. Charles Parish portion of Des Allemands is part of the New Orleans Metropolitan Statistical Area, while the Lafourche Parish portion is part of the Houma–Bayou Cane–Thibodaux Metropolitan Statistical Area.
Des Allemands was settled in 1721 by immigrants to the colony of Louisiana from Alsace and Lorraine under the control of John Law and the Company of the Indies.