The Ket (Кеть), also known in its upper reaches as the Bolshaya Ket (Большая Кеть) is a west-flowing river in the Krasnoyarsk Krai and Tomsk Oblast in Russia, a right tributary of the Ob. The Ket has a length of 1,621 kilometres and a drainage basin of 94,200 square kilometres. It freezes up in late October or early November and stays under the ice until late April or early May. Its main tributaries are the Sochur, Orlovka and Lisitsa from the right, Malaya Ket, Mendel, Yelovaya, and Chachamga from the left.
