| Piz Duan | |
| Elevation M: | 3131 |
| Prominence M: | 482 |
| Prominence Ref: | [1] |
| Parent Peak: | Pizzo Stella |
| Map: | Switzerland |
| Location: | Graubünden, Switzerland |
| Range: | Oberhalbstein Range |
| Coordinates: | 46.376°N 9.5835°W |
| Listing: | Alpine mountains above 3000 m |
Piz Duan is a mountain of the Oberhalbstein Range, overlooking Vicosoprano and the Val Bregaglia, in the Swiss canton of Graubünden.