Zakamensk (Russian: Зака́менск; Buryat: Захаамин, Zakhaamin) is a town and the administrative center of Zakamensky District of the Republic of Buryatia, Russia, located on the Dzhida River 420 kilometers (260 mi) southwest of Ulan-Ude and 8 kilometers (5.0 mi) from the border with Mongolia.