| Dasyllio | |
| Name Local: | Δασύλλιο |
| Type: | community |
| Caption Skyline: | Dasyllio village |
| Periph: | West Macedonia |
| Periphunit: | Grevena |
| Population: | 20 |
| Population As Of: | 2021 |
| Area: | 7.947 |
| Coordinates: | 40.165°N 31.9°W |
| Postal Code: | 511 00 |
| Area Code: | +30-2462 |
| Website: | Dasilio Grevenon |
| Licence: | PN |
| Elevation: | 1003 |
Dasyllio (before 1927: Μάγερ - Mager)[1] is a village and a community of the Grevena municipality.[2] Before the 2011 local government reform it was a part of the municipality of Agios Kosmas, of which it was a municipal district.[3] The 2021 census recorded 20 residents in the village. The community of Dasyllio covers an area of 7.947 km.[4] Dasyllio is a mountain village in the prefecture of Grevena. It is built at an altitude of 1,000 meters on the slopes of Smolikas.