The Communauté d'agglomération Paris-Saclay (or CPS) is an administrative entity in the Essonne département, near Paris.

[1] 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).

[2] The Communauté d'Agglomération Paris-Saclay is located at the north-west of the département of Essonne, on the plateau de Saclay.

The Communauté d'Agglomération Paris-Saclay consists of the following communes:[1][3] Passenger rail service is provided in the community by RATP and Transilien SNCF in several RER stations in the Paris-Saclay University campus : And more in the Paris-Saclay and Versailles research campus : The Paris-Saclay community has the LGV Atlantique high-speed rail line serving the Massy TGV station.

Long-distance bus service is provided by BlaBlaBus and Flixbus at Massy-Palaiseau RER and SNCF TGV station.