Saint-Forget is a commune in the Yvelines department in the Île-de-France region in north-central France. The commune consists of three hamlets: Le Mesnil-Sevin, Haute-Beauce, and The Sablons. This small town is 30 kilometers from Paris. It is nestled in the heart of the Regional Natural Park of the Upper Chevreuse Valley. As of 2019, there are 241 dwellings in the commune, of which 202 primary residences.