Diakopto is a coastal town in Achaea, West Greece, Greece. Since the 2011 local government reforms it is a municipal unit of the Aigialeia municipality. The municipal unit has an area of 103.932 km2. The town of Diakopto is situated on the Gulf of Corinth, near the mouth of the Vouraikos river and at the lower end of the Vouraikos Gorge. The 750 mm gauge Diakofto–Kalavryta Railway built in 1885 leads up to the town of Kalavryta passing the Mega Spilaio Monastery at about halfway.