Karasor (Kazakh: Қарасор) is a salt lake in May District, Pavlodar Region, Kazakhstan.

[1] The lake lies in the western part of May District, 25 kilometers (16 mi) southwest of the town of Zhumysker.

The Irtysh flows 33 kilometers (21 mi) to the east of the eastern shores of the lake.

There are a number of smaller lakes in its vicinity; the largest is Aktomar, 2 kilometers (1.2 mi) to the northwest.

Although it rarely dries up, in years of drought the level of Karasor sinks, and its southern projection may become a separate lake, also known as Zhinishkesor (Жіңішкесор).