The Ossau Valley (French: Vallée d'Ossau; Gascon: Aussau / la vath d'Aussau) is a valley of the French Pyrénées, in the Pyrénées-Atlantiques département.
18 communes belong to the Valley: Arudy, Aste-Béon, Béost, Bescat, Bielle, Bilhères, Buzy, Castet, Eaux-Bonnes, Gère-Bélesten, Izeste, Laruns, Louvie-Juzon, Louvie-Soubiron, Lys, Rébénacq, Sainte-Colome and Sévignacq-Meyracq.
Coordinates: 42°59′N 00°25′W / 42.983°N 0.417°W