| Official Name: | Ust-Katun |
| Native Name: | Усть-Катунь |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Biysky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 52.45°N 95°W[1] |
Ust-Katun (Russian: Усть-Катунь) is a rural locality (a settlement) in Biysky District, Altai Krai, Russia. The population was 449 as of 2013.[2] There are 11 streets. The postal code for the city is 659374.
Ust-Katun is located 13 km southwest of Biysk (the district's administrative centre) by road. Biysk is the nearest rural locality.[3]
The highest altitude is 171 meters (561 ft.) and it has a humid continental climate.