Cailly () is a commune in the Seine-Maritime department in the Normandy region in northern France. Geography A farming village situated in the Rouennais, some northeast of Rouen, at the junction of the D6, D12 and the D44 roads. The commune is the source of the small river of the same name, the Cailly. Population Places of interest The church of St.Martin, dating from the twelfth century. Vestiges of a 12th-century castle. See also Communes of the Seine-Maritime department References Communes of Seine-Maritime