| Unterbächhorn | |
| Elevation M: | 3620 |
| Elevation Ref: | [1] |
| Prominence M: | 82 |
| Map: | Switzerland |
| Location: | Valais, Switzerland |
| Range: | Bernese Alps |
| Coordinates: | 46.4061°N 7.9383°W |
The Unterbächhorn is located in the Bernese Alps, southeast of the Nesthorn. The higher Northwest-Peak of the Unterbächhorn (3,620 m) lies on the ridge towards Nesthorn. The Southeast-Peak (3,554 m) is the highest summit overlooking Belalp in the canton of Valais.
At its south-eastern flanks lies a glacier named Unnerbächgletscher.