Mairie de Montreuil (French pronunciation: [mɛʁi d(ə) mɔ̃tʁœj]) is a station on line 9 of the Paris Métro.

The decoration is in the Andreu-Motte style with two blue light canopies, benches (on the platform towards Pont de Sèvres only) and corridor outlets treated in flat white tiles and blue Motte seats (on the departure platform only).

These fittings are combined with the flat white ceramic tiles that cover the walls, the vault, and the tunnel exits.

The advertising frames are metal, and the name of the station is inscribed in Parisine font on enamelled plaques.

On the north tunnel exit of the embarkation platform, a mosaic is painted on Sèvres porcelain tiles, dated 1937, depicting a map of the city with images of the main monuments.