Castelnovo is the name of several comunes in Italy:
- Castelnovo Bariano, Province of Rovigo
- Castelnovo del Friuli, Province of Pordenone
- Castelnovo di Sotto, Province of Reggio Emilia
- Castelnovo ne' Monti, Province of Reggio Emilia
Castelnovo is the name of several comunes in Italy: