Agios Vasileios is a village in Nafpaktia Municipality, in the regional unit of Aetolia-Acarnania, in the region of West Greece, Greece. Agios Vasileios lies in the Ori Lidorikiou mountains. It has 86 inhabitants (2021). The nearest city is Patras, 20 km to the southwest. Beaches nearby: Grimpovo (2.5 km), Psani (3.2 km), Plataniti (6.3 km). Among the landmarks around are Calydon (27 km), Thermos (22 km) and Rio–Antirrio Bridge (11.7 km).
Also written Άγιος Βασίλειος.