| Kiya | |
| Source1: | Kuznetsk Alatau |
| Mouth: | Chulym |
| Mouth Coordinates: | 56.8531°N 86.665°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 548km (341miles) |
| Basin Size: | 32200km2 |
The Kiya (Russian: Ки́я) is a river in Tomsk and Kemerovo Oblasts of Russia. It is a left tributary of the Chulym (in the Ob's drainage basin), and is 548km (341miles) long, with a drainage basin of 32200km2. The river has its sources in the Kuznetsk Alatau and flows in a northwesterly direction to its mouth in the Chulym some 40km (30miles) upriver from the town of Asino.
Its main tributaries are from the right: Tyazhin and Chet, and from the left: Kozhakh and Antibes.
The town of Mariinsk lies along the Kiya.