Méry-sur-Oise (French pronunciation: [meʁi syʁ waz] ⓘ, literally Méry on Oise) is a commune in the Val-d'Oise department in Île-de-France in northern France.

Méry-sur-Oise station has rail connections to Persan, Saint-Leu-la-Forêt and Paris.

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