The Lac d'Enghien (; Lake of Enghien) is a freshwater artificial lake in the Parisian suburb of Enghien-les-Bains, France.
Lac d'Enghien is in the ÃÂle-de-France region, approximately seven miles north of Paris. Administratively it belongs to the commune of Enghien-les-Bains in the department of Val-d'Oise. It is the department's largest body of water.
The lake is roughly wide and long, with a circumference of and a total surface area of . The lake water is replenished by several small streams: the Corbon, Haras, d'Ermont, and d'Andilly, all of them under long .