Baykalsk (Russian:Байкальск;IPA:[bɐjˈkalʲsk]) is a town in Slyudyansky District of Irkutsk Oblast, Russia, located 41 kilometers (25mi) from Slyudyanka, the administrative center of the district. Population: 13,583(2010 Census);15,727(2002 Census);16,406(**** Census).