| San Pietro in Palazzi | |
| Coordinates: | 43.3269°N 10.5072°W |
| Province: | Livorno (LI) |
| Comune: | Cecina |
| Elevation M: | 12 |
| Population Total: | 3141 |
| Population As Of: | 2011 |
| Postal Code: | 57023 |
| Area Code: | (+39) 0586 |
San Pietro in Palazzi is a town 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 .
The town is about 33 km from Livorno and 2 km from Cecina.