Canton of Cergy-1

The canton of Cergy-1 is an administrative division of the Val-d'Oise department, Île-de-France region, northern France. It was created at the French canton reorganisation which came into effect in March 2015. Its seat is in Cergy.

It consists of the following communes:
 * 1) Cergy (partly)
 * 2) Osny
 * 3) Puiseux-Pontoise