| Official Name: | Katun |
| Native Name: | Катунь |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Buryatia#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Republic of Buryatia |
| Subdivision Name3: | Barguzinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +8:00 |
| Coordinates: | 53.6667°N 110°W[1] |
Katun (Russian: Катунь) is a rural locality (a selo) in Barguzinsky District, Republic of Buryatia, Russia. The population was 185 as of 2010.[2]
Katun is located 91 km west of Barguzin (the district's administrative centre) by road. Monakhovo is the nearest rural locality.[3]