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

The area surrounding lake Zhamantuz is used for agricultural fields and livestock grazing.

[2][1] Zhamantuz is an endorheic lake of the northern end of the Kazakh Uplands, part of the Kylshakty river basin.

The Kylshakty flows 15 kilometers (9.3 mi) to the north of the lake.

[2][3] Typha and Phragmites reeds grow in parts of the lakeshore.