| Castelnuovo | |
| Coordinates: | 43.0314°N 12.5856°W |
| Region: | Umbria |
| Province: | Province of Perugia |
| Comune: | Assisi |
| Elevation M: | 195 |
| Population Total: | 754 |
| Population As Of: | 2001 |
| Gentilic: | Castelnovesi |
| Saint: | Paschal Baylon |
| Day: | May 17 |
| Telephone: | 075 |
Castelnuovo is a Italian: [[frazione]] of the Italian: [[comune]] of Assisi in the Province of Perugia, Umbria, central Italy.Castelnuovo is situated about 9 km from Assisi and is located in the southwest of Santa Maria degli Angeli. Is surrounded also with the territories of other 2 fractions Assisi: Tordandrea to the west, and Rivotorto to the east. To the south is bordered by the Italian: [[comune]] of Cannara.
It stands at an elevation of 195 metres above sea level. At the time of the Istat census of 2001 it had 754 inhabitants.[1]
The most important watercourse is the river Ose, which basically it specify the frontier between Castelnuovo and Cannara.