| Piz Costainas | |
| Other Name: | Furkelspitz |
| Elevation M: | 3004 |
| Prominence M: | 199 |
| Prominence Ref: | [1] |
| Parent Peak: | Piz Cotschen |
| Map: | Alps |
| Location: | South Tyrol, Italy, Graubünden, Switzerland |
| Range: | Ortler Alps |
| Coordinates: | 46.5628°N 10.4736°W |
Piz Costainas (also known as Furkelspitz) is a mountain of the Ortler Alps, straddling the Swiss-Italian border between Graubünden and South Tyrol. It is the easternmost mountain rising above 3,000 metres in Switzerland.