| Official Name: | Ust-Yermilikha |
| Native Name: | Усть-Ермилиха |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Ust-Kalmansky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 52.0167°N 134°W[1] |
Ust-Yermilikha (Russian: Усть-Ермилиха) is a rural locality (a selo) in Kabanovsky Selsoviet, Ust-Kalmansky District, Altai Krai, Russia. The population was 77 as of 2013.[2] There is 1 street.
Ust-Yermilikha is located 41 km southwest of Ust-Kalmanka (the district's administrative centre) by road. Buranovo is the nearest rural locality.[3]