Nafpaktos is today a town and a former municipality in Aetolia-Acarnania, West Greece, Greece; its predecessor in the classical period is known in English as Naupactus. Nafpaktos is situated on a bay on the north coast of the Gulf of Corinth, west of the mouth of the river Mornos. The harbour is accessible only to the smallest craft. It is northeast of Antirrio, northeast of Patras, east of Missolonghi and southeast of Agrinio. The Greek National Road 48/E65 (Antirrio - Nafpaktos - Delphi - Livadeia) passes north of the town. It is the third largest town of Aetolia-Acarnania, after Agrinio and Missolonghi.