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Méry-sur-Oise (France)
region Île-de-France
Department Val d'Oise
Arrondissement Pontoise
Canton Saint-Ouen-l'Aumône
Community association Vallée de l'Oise et Trois Forêts
Coordinates 49 ° 4 ′  N , 2 ° 11 ′  E Coordinates: 49 ° 4 ′  N , 2 ° 11 ′  E
height 22-96 m
surface 11.17 km 2
Residents 9,892 (January 1, 2017)
Population density 886 inhabitants / km 2
Post Code 95540
INSEE code
Website https://www.merysuroise.fr/

Saint-Denis church

Méry-sur-Oise is a French commune in the Val-d'Oise department of the Île-de-France region in the Oise river valley . It has an area of ​​1117 hectares and 9892 inhabitants (as of January 1, 2017). The place has a small harbor on the banks of the Oise and is known for its castle .

Sources of income are the mushroom cultivation , tree and flower cultivation and vegetable cultivation located in former quarries . It is worth mentioning an ultra-modern water treatment system .


Méry-sur-Oise was first mentioned as Madriacus in a charter from the 9th century in connection with the friars of Saint-Denis , later belonged to Henry de Milly and was bought in 1357 by King Charles the Wise adviser Pierre d'Orgemont . His descendants owned the castle and domain until 1975.


See also: List of Monuments historiques in Méry-sur-Oise

The Méry-sur-Oise castle (16th century, rebuilt in the 17th / 18th centuries) was built on the site of the former priory of the Saint-Denis abbey and has an extensive French garden .

The church of St. Denis (15th / 16th century) has a beautiful stone font from the 13th century.

The Musée de l'Eau housed in the castle is also worth seeing .


  • Le Patrimoine des Communes du Val-d'Oise. Flohic Éditions, Volume 2, Paris 1999, ISBN 2-84234-056-6 , pp. 785-787.

Web links

Commons : Méry-sur-Oise  - Collection of images, videos and audio files