| Piz Radun | |
| Other Name: | Plangghorn |
| Elevation M: | 2581 |
| Prominence M: | 111 |
| Prominence Ref: | [1] |
| Parent Peak: | Piz Fess |
| Map: | Switzerland |
| Location: | Graubünden, Switzerland |
| Range: | Lepontine Alps |
| Coordinates: | 46.6918°N 9.2776°W |
Piz Radun (also known as Plangghorn) is a mountain of the Swiss Lepontine Alps, overlooking Safien in the canton of Graubünden.