The Vilyuy Dam (Russian: Вилюйская ГЭС; Yakut: Бүлүүтээҕи ГЭС, romanized: Bülüütêği GES) is a large dam and hydroelectric power station on the Vilyuy River in Chernyshevsky, Mirninsky District, Sakha Republic (Yakutia), Russia.

It is located in the southern part of the Vilyuy Plateau and was one of the first of such major structures in the world to be built on permafrost.

Its power station has four turbines with a combined capacity of 650 MW,[3] generating 2,710 million KWh annually.

It is one of the largest man-made lakes in the world, with a length of 450 km (280 mi) and holding up to 35.9 km3 (29,100,000 acre⋅ft) of water.

[1] The backwater system of the large artificial lake extends along the Vilyui River to the mouth of its Chirkuo tributary.