Saint-Gratien is a commune in the Val-d'Oise department, in the northern suburbs of Paris, France. It is located from the center of Paris. History On August 7, 1850, a part of the territory of Saint-Gratien was detached and merged with a part of the territory of Deuil-la-Barre, a part of the territory of Soisy-sous-Montmorency, and a part of the territory of Épinay-sur-Seine to create the commune of Enghien-les-Bains. On that occasion the commune of Saint-Gratien lost the scenic lake now known as the Lake of Enghien. Population Transport Saint-Gratien is served by Saint-Gratien station on Paris RER line and by the bus number 138 going to Paris — Porte de Clichy. See also Communes of the Val-d'Oise department References External links Official website Association of Mayors of the Val d'Oise Communes of Val-d'Oise