| Fossacesia | |
| Official Name: | Città di Fossacesia |
| Coordinates: | 42.25°N 43°W |
| Region: | Abruzzo |
| Province: | Chieti (CH) |
| Frazioni: | Campidoglio, Colle Cannizza, Colle Castagna, Fossacesia Marina, Sterpari, Strutto, Villa Scorciosa |
| Mayor: | Enrico di Giuseppantonio |
| Area Total Km2: | 30 |
| Population Total: | 6184 |
| Population As Of: | 31 October 2008 |
| Population Demonym: | Fossacesiani |
| Elevation M: | 142 |
| Saint: | St. Donatus of Arezzo |
| Day: | August 7 |
| Postal Code: | 66022 |
| Area Code: | 0872 |
Fossacesia is a city in the province of Chieti in the Abruzzo region of Italy.
The town is located on a small hill on the left of the Sangro River's mouth, about 2km (01miles) from the Adriatic Sea.
A historic attraction in the town is the Abbey of San Giovanni in Venere.
The town is also home to the Romanesque Period Church of San Silvestro, dating to the 11th century.