Penly is a former commune in the Seine-Maritime department in the Normandy region in northern France. On 1 January 2016, it was merged into the new commune of Petit-Caux. Geography A village of farming and light industry situated by the cliffs of the English Channel in the Pays de Caux at the junction of the D313 and the D925 roads, some northeast of Dieppe. Population Places of interest The Penly Nuclear Power Plant on the coast, with 2 reactors of 1300MW each. The church of St. Denis, dating from the twelfth century. See also Communes of the Seine-Maritime department References Former communes of Seine-Maritime