Lysimachia (Greek: Λυσιμαχία) is a lake in Aetolia-Acarnania, western Greece. Its area is 13.2 km², its depth is around 9 m. It is fed by the small river Ermitsa, and by a canal that connects the lake with the larger Lake Trichonida to its east. Its outflow is the river Dimikos, which drains into the river Acheloos. The city of Agrinio lies 6 km to the northeast.
|Native name||Λίμνη Λυσιμαχία (Greek)|
|Primary inflows||Ermitsa, canal from Lake Trichonida|
|Max. length||5.5 km (3.4 mi)|
|Max. width||2.5 km (1.6 mi)|
|Surface area||13.2 km2 (5.1 sq mi)|
|Max. depth||9 m (30 ft)|