| San Giovanni a Piro | |
| Official Name: | Comune di San Giovanni a Piro |
| Coordinates: | 40.0513°N 15.451°W |
| Province: | (SA) |
| Frazioni: | Bosco, Scario |
| Mayor: | Ferdinando Palazzo |
| Area Total Km2: | 37.9 |
| Population Footnotes: | [1] |
| Population Total: | 3868 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Sangiovannesi |
| Elevation M: | 450 |
| Saint: | Madonna of Pietrasanta |
| Day: | Last Sunday of May |
| Postal Code: | 84070 |
| Area Code: | 0974 |
San Giovanni a Piro (Cilentan: San Giuanni) is a town and comune in the province of Salerno in the Campania region of southern Italy.
The town is located on a hill on the road linking Marina di Camerota to Policastro Bussentino. The municipality counts part of the coastal area of Porto Infreschi, in which is located the Sanctuary of Pietrasanta. It borders with the municipalities of Camerota, Roccagloriosa, Santa Marina and Torre Orsaia.
San Giovanni a Piro counts two hamlets (frazioni), Bosco and Scario.