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:
- Cergy
- Osny
- Puiseux-Pontoise
