| Calto | |
| Official Name: | Comune di Calto |
| Coordinates: | 45°N 32°W |
| Region: | Veneto |
| Province: | Rovigo (RO) |
| Mayor: | Michele Fioravanti |
| Area Total Km2: | 10.85 |
| Population Footnotes: | [1] |
| Population Total: | 730 |
| Population As Of: | 30 April 2017 |
| Population Demonym: | Caltesi |
| Elevation M: | 11 |
| Postal Code: | 45030 |
| Area Code: | 0425 |
Calto 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.
Calto borders the following municipalities: Castelmassa, Ceneselli, Salara, Sermide e Felonica.