| Official Name: | Buyan |
| Native Name: | Буян |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Krutikhinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 53.8167°N 81°W[1] |
Buyan (Russian: Буян) is a rural locality (a selo) and the administrative center of Novodubrovsky Selsoviet, Krutikhinsky District, Altai Krai, Russia. The population was 628 as of 2013.[2] There are 5 streets.
Buyan is located 25 km southwest of Krutikha (the district's administrative centre) by road. Bolshoy Log is the nearest rural locality.[3]