Ernemont-sur-Buchy is a commune in the Seine-Maritime department in the Normandy region in northern France.
The inhabitants of the town of Ernemont-sur-Buchy are called Ernemontois, Ernemontoises in French.
A small farming village situated in the Pays de Bray, some northeast of Rouen at the junction of the D61, D93 and the D290 roads.