Lake Onega (also known as Onego, Russian: Оне́жское о́зеро, tr. Onezhskoe ozero; IPA: [ɐˈnʲɛʂskəɪ ˈozʲɪrə]; Finnish: Ääninen or Äänisjärvi; Karelian: Oniegu or Oniegu-järve; Veps: Änine or Änižjärv) is a lake in the north-west European part of Russia, located on the territory of Republic of Karelia, Leningrad Oblast and Vologda Oblast. It belongs to the basin of the Baltic Sea, Atlantic Ocean, and is the second largest lake in Europe after Lake Ladoga.