- Aitoliko is a town and a former municipality in Aetolia-Acarnania, West Greece.
- The old part of the town lies on an island between two lagoons; the Aitoliko Lagoon, which extends up to Stamna, lies to the north, and the Missolonghi Lagoon, which was Lake Kynia in antiquity lies to the south and connects with Gulf of Patras and into the Ionian Sea. The island is connected to the mainland on each side by two bridges.
- Aitoliko was located with relation to the ancient towns of Pleuron and Oiniadai. The name of the town in the middle of the lagoon dates back to ancient times.
- Around 900 A.D, the Byzantine fleet from Naupaktos (Lepanto) at the Gulf of Corinth became and capital and became Nikopolis. The new capital became secured by the fortress. One of these fortresses were favourable for defense on the island and the lagoons in Aitoliko. Since the 12th century, the island fortress of Anatoliko developed to the city.
- During the Greek War of Independence against the Ottoman Empire, in the beginning of the 19th century, Aitolikon experienced three Turkish sieges before it became a part of Greece.
- Population: 4,935 (2011)