Lake Yessey () is a large freshwater arctic lake in Evenkiysky District, Krasnoyarsk Krai, north-central part of Russia.
The lake is located in the Central Siberian Plateau, to the west of the course of the Kotuy river. A tributary of the Kotuy flows out of the southern end of the lake. It has an area of .
The lake is rich in fish. The endangered Lake Yessey charr (Salvelinus tolmachoffi), is found in the waters of the lake.