The Communauté d'agglomération Paris-Saclay (or CPS) is an administrative entity in the Essonne département, near Paris. The administrative center is Orsay. It was formed on 1 January 2016 by the merger of the former Communauté d'agglomération du Plateau de Saclay (CAPS) and the Communauté d'agglomération Europ'Essonne(E²). Its area is 185.9 km2. Its population was 314,169 in 2018.