| 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 municipality (it|[[comune]]) 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.