| Collemezzano | |
| Coordinates: | 43.3558°N 10.5286°W |
| Province: | Livorno (LI) |
| Comune: | Cecina |
| Elevation M: | 70 |
| Population Total: | 14 |
| Population As Of: | 2011 |
| Postal Code: | 57023 |
| Area Code: | (+39) 0586 |
Collemezzano is a village in Tuscany, central Italy, administratively a frazione of the comune of Cecina, province of Livorno. At the time of the 2011 census its population was 14.
Collemezzano is about 35 km from Livorno and 6 km from Cecina.