| Casasco | |
| Official Name: | Comune di Casasco |
| Coordinates: | 44.8333°N 9°W |
| Region: | Piedmont |
| Province: | Alessandria (AL) |
| Mayor: | Enrico Mandirola |
| Area Total Km2: | 9.04 |
| Population Footnotes: | [1] |
| Population Total: | 115 |
| Population As Of: | 31 May 2021 |
| Population Demonym: | Casaschesi |
| Elevation M: | 398 |
| Postal Code: | 15050 |
| Area Code: | 0131 |
Casasco is a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about 110km (70miles) east of Turin and about 30km (20miles) southeast of Alessandria.
Casasco borders the following municipalities: Avolasca, Brignano-Frascata, Garbagna, Momperone, and Montemarzino.