Babushkin (Russian: Ба́бушкин), known as Mysovsk (Мысовск) before 1941, is a town in Kabansky District of the Republic of Buryatia, Russia, located on the southern shore of Lake Baikal on the Trans-Siberian Railway. Population: 4,831 (2010 Census); 4,953 (2002 Census); 7,298 (1989 Census); 9,000 (1967).