| Proastio | |
| Name Local: | Προάστιο |
| Type: | community |
| Periph: | Thessaly |
| Periphunit: | Karditsa |
| Municipality: | Palamas |
| Municunit: | Sellana |
| Population: | 1434 |
| Population As Of: | 2021 |
| Coordinates: | 39.4833°N 75°W |
| Licence: | ΚΑ |
Proastio (el|Προάστιο, before 1962: Παραπράσταινα - Paraprastaina[1]) is a Greek village in the northern part of the Karditsa regional unit, Greece. Proastio was the seat of the former municipality Sellana. It is located in a flat rural area, near the right bank of the river Pineios. It is 14 km north of Karditsa and 14 km southeast of Trikala.