| Official Name: | Ust-Muny |
| Native Name: | Усть-Муны |
| Settlement Type: | Village |
| Pushpin Map: | Russia Altai Republic#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Republic |
| Subdivision Name3: | Mayminsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 51.7167°N 130°W[1] |
Ust-Muny (Russian: Усть-Муны; Southern Altai: Ыны, Inı) is a rural locality (a selo) and the administrative centre of Ust-Munynskoye Rural Settlement of Mayminsky District, the Altai Republic, Russia. The population was 445 as of 2016.[2] There are 19 streets.
Ust-Muny is located on the Katun River, 47 km south of Mayma (the district's administrative centre) by road. Barangol is the nearest rural locality.[3]