The Orbieu (French pronunciation: [ɔʁbjø]; Occitan: Orbiu) is an 84.2-kilometre (52.3 mi) long river in the Aude département, in south central France. Its source is at Fourtou, in the Corbières Massif. It flows generally northeast. It is a right tributary of the Aude into which it flows between Raissac-d'Aude and Marcorignan, 10 kilometres (6 mi) northwest of Narbonne.

This list is ordered from source to mouth: Fourtou, Auriac, Lanet, Montjoi, Vignevieille, Mayronnes, Saint-Martin-des-Puits, Saint-Pierre-des-Champs, Lagrasse, Ribaute, Camplong-d'Aude, Fabrezan, Ferrals-les-Corbières, Lézignan-Corbières, Luc-sur-Orbieu, Cruscades, Ornaisons, Névian, Villedaigne, Raissac-d'Aude, Marcorignan