Zakamensk (Russian: Зака́менск; Buryat: Захайнаман, Zakhajnaman) 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 Mongolian border. Population: 11,530 (2010 Census preliminary results); 12,709 (2002 Census); 15,591 (1989 Census).