Aoös or Vjosë (Greek: Αώος) is a river in northwestern Greece and southwestern Albania. Its total length is about 272 kilometres (169 mi), of which the first 80 kilometres (50 mi) are in Greece, and the remaining 192 kilometres (119 mi) are in Albania.
Vjosë is fed by two secondary branches, both in Albania, the Drino river and the Shushicë. Its source is in Greece, specifically in the Pindus mountains in Epirus, near the village of Vovousa. An artificial lake has been constructed at an altitude of 1350 metres, and there is a hydroelectric dam in place since 1987.
It flows through the Vikos–Aoös National Park, where it forms impressive canyons. It flows through Konitsa, and enters Albania near Çarshovë. It continues northwest through Përmet, Këlcyrë, Tepelenë, Memaliaj, Selenicë and Novoselë. It flows into the Adriatic Sea, northwest of Vlorë.