| Acheloos | |
| Name Local: | Αχελώος |
| Type: | municipal unit |
| Periph: | Thessaly |
| Periphunit: | Karditsa |
| Population: | 913 |
| Population As Of: | 2021 |
| Area: | 87.4 |
| Coordinates: | 39.2167°N 46°W |
| Licence: | ΚΑ |
Acheloos (Greek, Modern (1453-);: Αχελώος) is a former municipality in the Karditsa regional unit, Thessaly, Greece. Since the 2011 local government reform it is part of the municipality Argithea, of which it is a municipal unit.[1] The municipal unit has an area of 87.430 km2.[2] It is named after the Acheloos River. Population 913 (2021). The seat of the municipality was in Vragkiana.