Sasykkol (Kazakh: Сасықкөл, Sasyqköl) is a lake in eastern Kazakhstan.

Into the Sasykkol lake (translated from the Kazakh language "Sasyk" - rotten, fetid;" Kol " - lake), in the delta of the Alakol Biosphere Reserve, flows the Tentek river from the south.

The average depth of the lake is about 3 m, and the maximum -4.7 m. The average annual water level varies up to 60 cm due to the fact that the lake is flowing.

Since the water in the lake is fresh, its mineralization varies during the year from 0.27 to 2.16 g/L.

Lake Sasykkol is part of the Alakol Biosphere Reserve, designated by UNESCO as part of its Man and the Biosphere Programme in 2013.