Conches-en-Ouche is a commune in the Eure département in northern France. It is located by the Rouloir river, southwest of Évreux in the N…Conches-en-Ouche is a commune in the Eure département in northern France. It is located by the Rouloir river, southwest of Évreux in the Normandy region. The town is located on a plateau known as the Pays d'Ouche.