| Tușnad | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Harghita County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Lăzărești, Tușnad |
| Length: | 13km (08miles) |
| Mouth: | Olt |
| Mouth Location: | Tușnad |
| Mouth Coordinates: | 46.195°N 25.8986°W |
| Basin Size: | 37km2 |
The Tușnad is a left tributary of the river Olt in Romania. It discharges into the Olt in the village Tușnad. Its length is 13km (08miles) and its basin size is 37km2.