Ulken Kamkaly (Kazakh: Улкен Қамқалы; Russian: Большой Камкалы, "Big Kamkaly") is a lake in the Sarysu District, Jambyl Region, Kazakhstan.

[2][3][1] Ulken Kamkaly lies at the northern edge of the Moiynkum Desert, in the lower Chu river basin.

It is located less than 1.5 kilometers (0.93 mi) to the south of the Chu river channel.

To the northwest lies smaller lake Kishi Kamkaly.

Ulken Kamkaly freezes in the winter and the ice thaws by March.