Aigio, also written as Aeghion, Aegion, Aegio, Egio (Greek: Αίγιο, romanized: Aígio, pronounced [ˈeʝio]; Latin: Aegium), is a town and a former municipality in Achaea, West Greece, on the Peloponnese.

The river Selinountas flows into the Gulf of Corinth in Valimitika, 5 km east of Aigio town centre.

After the disaster of Helike, which was destroyed by an earthquake and buried by a tsunami in 373 BC, Aigion took the territory of the neighbouring city.

Around the year 275 BC, the people expelled the Macedonian garrison and the city joined the new Achaean League.

Serbo-Croatian Voščíca [sic] and Voštane, and Slovenian Vošče) and one from the Church Slavonic word ovoštь, meaning "fruit".

Dionysios Zakythinos, a Greek scholar of Byzantium, gives a similar interpretation, explaining the name as meaning "fruit-bearing place".

From Βosta was derived the word Bostan/Bostani, which is common in the Greek and Turkish languages, and means garden (other linguists believe that Bosta is of Persian origin).

In 1459 it was conquered by the Ottoman Empire, which ruled it until the outbreak of the Greek War of Independence, except for brief interruptions by the Venetians from 1463 until 1470, and from 1685 until 1715.

In July 1822, at Akrata, near the town, a force of Greek fighters under Londos, Zaimis and Petimezas surrounded and attacked a group of 4000 Turks marching to Patras, after their defeat at the Battle of Dervenakia.

On June 15, 1995, a serious earthquake destroyed many buildings and damaged roads in the downtown and southwestern sections,[9] with a number of casualties.

The earthquake shattered Aigio: small memorials are found throughout the city, with candles aglow day and night to remember the victims.

With drought heightening risk, the mountainous countryside near Aigio was severely damaged by the 2007 Greek forest fires.

[12] The port also has railroad tracks, but the Hellenic Railways Organisation (OSE) announced suspension of service in Aigio and across the Peloponnese in January 2011.

The Hospital performs the greatest number of laparoscopic surgeries in Greece, while more than 50,000 people are examined on a yearly basis.