Le Grand-Quevilly is a commune in the Seine-Maritime department in the Normandy region in north-western France. The town is third largest s…Le Grand-Quevilly is a commune in the Seine-Maritime department in the Normandy region in north-western France. The town is third largest suburb of Rouen, a port with considerable light industry situated just 3 miles southwest of the centre of Rouen, at the junction of the D 3, D 492 and the D 338 roads.