Saint-Jean-du-Cardonnay () is a commune in the Seine-Maritime department in the Normandy region in northern France. Geography A village of forestry and farming situated in the Roumois, just northwest of the centre of Rouen at the junction of the D90, D267 with the D6015 road. Population Places of interest The church of St.Jean, dating from the sixteenth century. A seventeenth-century chateau. A chapel built in 1820. See also Communes of the Seine-Maritime department References Communes of Seine-Maritime