| Riotorto | |
| Coordinates: | 42.9742°N 10.6808°W |
| Province: | Livorno (LI) |
| Comune: | Piombino |
| Elevation M: | 52 |
| Population Total: | 1445 |
| Population As Of: | 2011 |
| Postal Code: | 57025 |
| Area Code: | (+39) 0565 |
Riotorto is a town in Tuscany, central Italy, administratively a frazione of the comune of Piombino, province of Livorno. At the time of the 2011 census its population was .
Riotorto is about 80 km from Livorno and 15 km from Piombino.