| Castelnovo Bariano | |
| Official Name: | Comune di Castelnovo Bariano |
| Coordinates: | 45.0333°N 28°W |
| Region: | Veneto |
| Province: | Rovigo (RO) |
| Frazioni: | San Pietro Polesine, Torricelle, Torretta |
| Mayor: | Massimo Biancardi |
| Area Total Km2: | 37.91 |
| Population Footnotes: | [1] |
| Population Total: | 2722 |
| Population As Of: | 30 June 2017 |
| Elevation M: | 12 |
| Saint: | St. Anthony |
| Day: | 13 June |
| Postal Code: | 45030 |
| Area Code: | 0425 |
Castelnovo Bariano is a comune (municipality) in the Province of Rovigo in the Italian region Veneto, located about 90km (60miles) southwest of Venice and about 40km (30miles) west of Rovigo.
Castelnovo Bariano borders the following municipalities: Bergantino, Carbonara di Po, Castelmassa, Ceneselli, Giacciano con Baruchella, Legnago, Sermide e Felonica and Villa Bartolomea.