Gusinoozersk (Russian: Гусиноозёрск; Buryat: Галуута Нуур, Galuuta Nuur; Mongolian: Галуутнуур, Galuutnuur) is a town and the administrative center of Selenginsky District of the Republic of Buryatia, Russia.

The town is located in the area of the Selenga Highlands, on the northeastern shore of Lake Gusinoye, 110 kilometers (68 mi) southwest of Ulan-Ude.

In 1953, it was granted town status and given its present name,[citation needed] derived from Gusinoye Ozero (lit.

[4] The main focus of the town's economy remains brown coal production and the associated power station, although mining activities on the nearby deposits slowed during the economic crisis of the 1990s.

The 245th Motor Rifle Division of the Russian Ground Forces was located in the town until it was reduced to a Base for Storage of Weapons and Equipment in 2006.