The Yaya (Russian: Яя) is a river in Siberian Russia, a left tributary of the Chulym, that flows through Kemerovo and Tomsk oblasts.

It is 380 kilometres (240 mi) long, and has a drainage basin of 11,700 square kilometres (4,500 sq mi).^[1]

It originates in Kuznetsk Alatau. The urban-type settlement of Yaya is situated on this river.^{[citation needed]}