Lake Maurepas is located in southeastern Louisiana approximately halfway between New Orleans and Baton Rouge directly west of Lake Pontchartrain.
Lake Maurepas was named for Jean-Frédéric Phélypeaux, Count of Maurepas, an eighteenth-century French statesman, chief adviser to King Louis XVI. Maurepas was the son of Louis Phélypeaux, comte de Pontchartrain for whom Lake Pontchartrain is named.