Biryusinsk () is a town in Tayshetsky District of Irkutsk Oblast, Russia, located on the right bank of the Biryusa River (Angara's basin),  northwest of Irkutsk, the administrative center of the oblast.
Biryusinsk () is a town in Tayshetsky District of Irkutsk Oblast, Russia, situated on the banks of the Biryusa River (within the Angara river basin), north of Irkutsk, the administrative hub of the region.