The organisation named Communauté de Communes de la Haute Vallée de Chevreuse is a group of municipalities in the department of the Yvelines, in Ile-de-France. The total population of this intermunicipal organisation is 25546 inhabitants, spread across a surface area of 83.74 km². The population density is 268 inhabitants/km². The altitude varies between 66 metres and 179 metres. The Communauté de Communes de la Haute Vallée de Chevreuse public intermunicipal cooperation establishment comprises the 10 municipalities listed below.