Zhamantuz (Kazakh: Жамантұз) is a salt lake in the May District, Pavlodar Region, Kazakhstan.

[1] The lake lies in the western part of May District, 60 kilometers (37 mi) to the WSW of Maytubek village.

The Bolshoy Togyzbay and Kainama winter resorts are located near the lake.

[2][3] Zhamantuz is an endorheic lake of the northern end of the Kazakh Uplands, part of the Irtysh river basin.

[1] The lake freezes in mid November and stays under ice until the second half of April.