Thil-Manneville is a commune in the Seine-Maritime department in the Normandy region in north-western France. Geography A farming village situated by the banks of the river Vienne in the Pays de Caux, some southwest of Dieppe, at the junction of the D70 with the D123 and the D127 roads. Population Places of interest The church of St. Sulpice, dating from the eleventh century. A sixteenth-century château. See also Communes of the Seine-Maritime department References Communes of Seine-Maritime