| Mattwaldhorn | |
| Elevation M: | 3246 |
| Prominence M: | 223 |
| Prominence Ref: | [1] |
| Parent Peak: | Weissmies |
| Map: | Switzerland |
| Location: | Valais, Switzerland |
| Range: | Pennine Alps |
| Coordinates: | 46.1988°N 7.9543°W |
The Mattwaldhorn is a mountain of the Swiss Pennine Alps, located between the upper Nanztal and the Saastal in the canton of Valais. The nearest locality is Eisten on the west side.