Aigialeia (Greek: Αιγιάλεια, pronounced [eˈʝalia]) is a municipality and a former province (επαρχία) in the eastern part of the Achaea regional unit, Greece.

The municipality Aigialeia stretches from the south coast of the Gulf of Corinth to the mountainous interior of the Peloponnese peninsula.

Several towns of the Achaean League were located here: Rhypes, Aegium, Ceryneia, Boura, Helice, Aegae and Aigeira.

[5] In the Middle Ages, the area was ruled by the Byzantines, Slavs, Franks, Venetians, and from the 16th century the Ottoman Turks.

The 2007 Greek forest fires cause great damage in the mountains of Aigialeia.