Severobaykalsk (; , Khojto-Bajgal) is a town in the Republic of Buryatia, Russia, located on the northern end of Lake Baikal at the mouth of the Tyya River, northwest of Ulan-Ude and northeast of Irkutsk. Population:

Severobaykalsk is located on a plateau at the northern end of Lake Baikal at the mouth of the Tyya River. To the west the town is surrounded by the Baikal Mountains, to the northeast by the Stanovoy Range. Severobaykalsk is geographically isolated, the closest town is Ust-Kut, more than away. The closest large cities are Ulan-Ude, to the southeast and Irkutsk, more than to the southwest.