The Yerres (French pronunciation: [jɛʁ] ) is a 98.2 km (61.0 mi) long river in northern France located in the departments of Seine-et-Marne, Essonne and Val-de-Marne (Île-de-France). It is a right tributary of the river Seine.[1] It flows into the Seine in Villeneuve-Saint-Georges, a southeastern suburb of Paris.