Kazim (Russian: Казы́м) is a river in Russia. It flows over the West Siberian Plain, and is a right tributary of the Ob. The Kazim is 659 kilometres (409 mi) long, with a drainage basin of 35,600 square kilometres (13,700 sq mi). Its average discharge is 267 cubic metres per second (9,400 cu ft/s).
The town of Beloyarsky is along the Kazim.