| Official Name: | Mayak |
| Native Name: | Маяк |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Charyshsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 51.6°N 109°W[1] |
Mayak (Russian: Маяк) is a rural locality (a selo) and the administrative center of Mayaksky Selsoviet, Charyshsky District, Altai Krai, Russia. The population was 455 as of 2013.[2] It was founded in 1890. There are 8 streets.
Mayak is located 49 km north of Charyshskoye (the district's administrative centre) by road. Pervomaysky is the nearest rural locality.[3]