Ust-Olenyok – a settlement on a mountain slope on the right bank of the Olenyok River in the Republic of Sakha-Yakutia, Russia. According to the 2010 census, the 27 residents of U. are involved in fishing and hunting. Outside U. there is a grave of Vasili Pronchishchev and his wife, participants of the Great Northern Expedition. U. also accommodates a hydrometeorological station of the same name (the “Ust-Olenyok” hydrometeorological station). In the 1940s–1950s, the village had a fish-processing plant with the workforce of Finnish workers relocated from the Leningrad Region.