| Askio | |
| Name Local: | Άσκιο |
| Type: | municipal unit |
| Coordinates: | 40.3°N 51°W |
| Elevation: | 878 |
| Periph: | Western Macedonia |
| Periphunit: | Kozani |
| Municipality: | Voio |
| Population As Of: | 2021 |
| Population: | 3070 |
| Area: | 196.636 |
| Postal Code: | 503 00 |
| Area Code: | +30-2465 |
| Licence: | KZ |
Askio (Greek: Άσκιο) is a former municipality in Kozani regional unit, West Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Voio, of which it is a municipal unit.[1] The municipal unit has an area of 196.636 km2.[2] The 2021 census recorded 3,070 residents in Askio. The seat of the municipality was in Kaloneri. It was named after the Askio mountain range which covers most of the municipal unit.