| Official Name: | Kuyagan |
| Native Name: | Куяган |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Altaysky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 51.7°N 138°W[1] |
Kuyagan (Russian: Куяган) is a rural locality (a selo) and the administrative center of Kuyagansky Selsoviet, Altaysky District, Altai Krai, Russia. The population was 779 as of 2013.[2] There are 19 streets.
Kuyagan is located on the Kuyagan River, 52 km southwest of Altayskoye (the district's administrative centre) by road. Kazanka is the nearest rural locality.[3]