Alkamergen (Kazakh: Алқамерген) is a lake in May District, Pavlodar Region, Kazakhstan.

[1] The lake lies in the western part of May District, 70 kilometers (43 mi) northeast of the town of Bayanaul.

[2][3] Alkamergen lies in a tectonic depression of the Kazakh Uplands, roughly 60 kilometers (37 mi) to the northeast of the northeastern slopes of the Bayanaul Range.

The water of the lake is brackish, fresher in the spring and with increased salinity in the summer.

In years of drought the level of Alkamergen sinks and the northern end becomes a separate lake connected with the southern section by a narrow sound.