Kazy (; ) is a salt lake in Akkuly District, Pavlodar Region, Kazakhstan.
The lake is located to the south of Kazy village, to the northwest of Malybay, about west of the Russia-Kazakhstan border. Akkuly, the district capital, lies to the southwest.
Kazy is part of the Irtysh basin. It lies in a tectonic depression of the Kulunda Plain. Lake Borli is located to the northwest, Kyzyltuz to the ESE, and Seiten to the north.
The shape of the lake is roughly oval. Compared to neighboring lakes it is relatively deep and displays a bluish-green hue. The eastern and northwestern shores are flat and swampy, but the southern coast is rocky.
Lake Kazy is surrounded by steppe vegetation. The water is salty and has a high mineralization. It is not suitable for watering livestock.