| Castelmassa | |
| Official Name: | Comune di Castelmassa |
| Coordinates: | 45.0167°N 30°W |
| Region: | Veneto |
| Province: | Rovigo (RO) |
| Mayor: | Eugenio Boschini |
| Area Total Km2: | 11.84 |
| Population Footnotes: | [1] |
| Population Total: | 4138 |
| Population As Of: | 30 June 2017 |
| Population Demonym: | Castelmassesi |
| Elevation M: | 12 |
| Saint: | St. Stephen |
| Day: | 26 December |
| Postal Code: | 45035 |
| Area Code: | 0425 |
Castelmassa is a comune (municipality) in the Province of Rovigo in the Italian region Veneto, located about 90km (60miles) southwest of Venice and about 35km (22miles) west of Rovigo. Castelmassa borders the following municipalities: Calto, Castelnovo Bariano, Ceneselli, Felonica, Sermide.
See also: List of twin towns and sister cities in Italy.
Castelmassa is twinned with:
