| Castelbaldo | |
| Official Name: | Comune di Castelbaldo |
| Coordinates: | 45.1333°N 38°W |
| Region: | Veneto |
| Province: | Padua (PD) |
| Mayor: | Riccardo Berardinello |
| Area Total Km2: | 15.17 |
| Population Footnotes: | [1] |
| Population Total: | 1421 |
| Population As Of: | 31 August 2021 |
| Population Demonym: | Castelbaldesi |
| Elevation M: | 12 |
| Postal Code: | 35040 |
| Area Code: | 0425 |
Castelbaldo is a comune (municipality) in the Province of Padua in the Italian region Veneto, located about 80km (50miles) southwest of Venice and about 45km (28miles) southwest of Padua.
Castelbaldo borders the following municipalities: Badia Polesine, Masi, Merlara, Terrazzo.