Malybay (Kazakh: Малыбай) is an endorheic lake in Akkuly District, Pavlodar Region, Kazakhstan.

Akkuly, the district capital, lies 42 kilometers (26 mi) to the southwest.

[2] The lake has an elongated shape, stretching from east to west for about 9 kilometers (5.6 mi).

Malybay is fairly deeper than other lakes in the area and its waters have a darker hue.

Reeds grow in most stretches of the lakeshore providing a habitat for aquatic birds and muskrats.