The Yaya () is a river in Siberian Russia, a left tributary of the Chulym, that flows through Kemerovo and Tomsk oblasts. It is  long, and has a drainage basin of .
The Yaya River, situated in Siberian Russia, is a left tributary of the Chulym River, flowing through the Kemerovo and Tomsk oblasts. Its significant length and vast drainage basin are key characteristics.