| Kastro | |
| Name Local: | Κάστρο |
| Periph: | West Macedonia |
| Periphunit: | Grevena |
| Municunit: | Grevena |
| Community: | Elatos |
| Population: | 11 |
| Population As Of: | 2021 |
| Coordinates: | 40.0917°N 39.2°W |
| Postal Code: | 511 00 |
| Area Code: | +30-2462 |
| Licence: | PN |
| Elevation: | 820 |
Kastro is a village of the Grevena municipality. Before the 1997 local government reform it was a part of the community of Elatos.[1] The 2021 census recorded 11 residents in the village.