| Monte San Giovanni in Sabina | |
| Official Name: | Comune di Monte San Giovanni in Sabina |
| Coordinates: | 42.3333°N 59°W |
| Region: | Lazio |
| Province: | Rieti (RI) |
| Mayor: | Salvatore Mei |
| Area Total Km2: | 30.76 |
| Population Footnotes: | [1] |
| Population Total: | 684 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Sangiovannesi |
| Elevation M: | 728 |
| Postal Code: | 02040 |
| Area Code: | 0765 |
Monte San Giovanni in Sabina is a Italian: [[comune]] (municipality) in the Province of Rieti in the Italian region of Latium, located about 50km (30miles) northeast of Rome and about 10km (10miles) southwest of Rieti.
It is located on a ridge of the Monti Sabini. The town grew around a walled castle, which was first mentioned in 1240.