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, a major waterway in Siberia, flows through the Kemerovo and Tomsk regions of Russia. It is a left tributary of the Chulym River and has a substantial drainage basin.