| Yaya | |
| Mouth: | Chulym |
| Mouth Coordinates: | 56.9672°N 86.3717°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 380km (240miles) |
| Basin Size: | 11700km2 |
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 .
It originates in Kuznetsk Alatau. The urban-type settlement of Yaya is situated on this river.