| Zalongo | |
| Name Local: | Ζάλογγο |
| Type: | municipal unit |
| Caption Skyline: | Monastery of Zalongo. |
| Periph: | Epirus |
| Periphunit: | Preveza |
| Population: | 3986 |
| Population As Of: | 2021 |
| Area: | 137.6 |
| Coordinates: | 39.1333°N 60°W |
| Licence: | ΡΖ |
Zalongo (Greek, Modern (1453-);: Ζάλογγο) is a former municipality in the Preveza regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Preveza, of which it is a municipal unit.[1] The municipal unit has an area of 137.631 km2.[2] Population 3,986 (2021). The seat of the municipality was in Kanali. Nearby is the 18th century Zalongo Monastery, immortalized by the defiant mass suicide of a group of Souliot women. The ruins of ancient Cassope are situated near the village Kamarina.