| Castelvetere sul Calore | |
| Official Name: | Comune di Castelvetere sul Calore |
| Coordinates: | 40.9297°N 14.9869°W |
| Region: | Campania |
| Province: | Avellino (AV) |
| Frazioni: | Campoloprisi, Cipollara, Santa Lucia, Tremauriello, Vioni |
| Mayor: | Romano Giovanni Remigio |
| Area Total Km2: | 17.06 |
| Population Footnotes: | [1] |
| Population Total: | 1580 |
| Population As Of: | 30 June 2017 |
| Population Demonym: | Castelveteresi |
| Elevation M: | 750 |
| Saint: | Virgin Mary |
| Day: | 2 July, 28 April |
| Postal Code: | 83040 |
| Area Code: | 0827 |
Castelvetere sul Calore is a comune in the province of Avellino, Campania, southern Italy. It takes its name from the Calore Irpino river that flows nearby.