Ust-Kut (Russian: Усть-Кут) is a town in Irkutsk Oblast, Russia. Located on a western loop of the Lena River, it spreads out over 20 kilometers (12 mi) along the left bank, near the point where the Kuta River joins from the west. The town's name means mouth of the Kuta River in Russian, with the name "Kuta" coming from an Evenk word meaning "peat bog". Population: 45,061 (2010 Census preliminary results); 49,951 (2002 Census); 61,165 (1989 Census).