Angara, a river of Siberia, which enters Lake Baikal at its N. extremity, under the name of Upper Angara, leaves it near the S. W. end as the Lower Angara or Upper Tunguska, flows past Irkutsk, pursues a N. and W. course for about 750 m., until it is joined by the river Tchadobet, continues in a westerly direction about 250 m. further, and empties into the Yenisei, E. of Yeniseisk.