The Saghyz (Kazakh: Сағыз, Sağyz, Russian: Сагиз, Sagiz) is a river of western Kazakhstan. It is 511 kilometres (318 mi) long, and has a drainage basin of 19,400 square kilometres (7,500 sq mi). It ends in a number of salt lakes in the Caspian Depression. The town Saghyz lies on its upper course.