Longmesnil () is a commune in the Seine-Maritime department in the Normandy region in northern France. Geography A tiny farming village situated in the valley of the river Epte in the Pays de Bray, some southeast of Dieppe on the D129 near its junction with the D156 road. Population Places of interest The church of St.Martin, dating from the twelfth century. See also Communes of the Seine-Maritime department References Communes of Seine-Maritime