Zhamantuz (Kazakh: Жамантұз) is a salt lake in the Aksu City Administration, Pavlodar Region, Kazakhstan.

[1] The lake lies 50 kilometers (31 mi) to the southwest of Aksu city.

The area surrounding the lake is used for livestock grazing in the spring.

[2][3] Zhamantuz is an endorheic lake of the northern end of the Kazakh Uplands.

The Irtysh flows 60 kilometers (37 mi) to the east of the eastern shores of the lake.