Tuzdysor (Kazakh: Тұздысор; Russian: Туздысор) is a salt lake in the Ekibastuz City Administration, Pavlodar Region, Kazakhstan.

[1] Tuzdysor is one of the main lakes in the area surrounding Ekibastuz and is part of the Irtysh Water Management Basin.

[2] There is commercial salt extraction at the lake, part of a project that has been implemented recently.

The northern end of larger lake Karasor lies 7 kilometers (4.3 mi) to the southeast and lake Shandaksor, with the Ekibastuz GRES-2 Power Station by its eastern shore, is located 9 kilometers (5.6 mi) to the southwest.

Sprawling lake Shureksor lies 15 kilometers (9.3 mi) to the northeast.