Administration
Cergy is the chief town of two cantons:
- The canton of Cergy-Nord is made of part of Cergy and communes of Boissy-l'Aillerie, Osny, Puiseux-Pontoise (53,779 inhabitants)
- The canton of Cergy-Sud is made of part of Cergy and the commune of Éragny (32,969 inhabitants).
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