The Angara (Buryat and , "Angar",  "Cleft"; , "Angará") is a major river in Siberia, which traces a course through Russia's Irkutsk Oblast and Krasnoyarsk Krai. It drains out of Lake Baikal and is the headwater tributary of the Yenisey. It is long, and has a drainage basin of . It was formerly known as the Lower or Nizhnyaya Angara (distinguishing it from the Upper Angara). Below its junction with the Ilim, it was formerly known as the Upper Tunguska (, "Verkhnyaya Tunguska", distinguishing it from the Lower Tunguska) and, with the names reversed, as the Lower Tunguska.