Aitoliko (Greek: Αιτωλικό) is a town and a former municipality in Aetolia-Acarnania, West Greece, Greece. Since the 2011 local government reform it is part of the municipality Messolonghi, of which it is a municipal unit. The municipal unit has an area of 129.305 m2. It is located north of the Acheloos delta. The Greek National Road 5/E55 passes through the municipal unit. It is located SW of Agrinion, about 20 km NW of Messolonghi, W of Nafpaktos and the Rio-Antirrio bridge and SE of Astakos. Until it became a part of Greece, it was known as Anatoliko (Ανατολικό), meaning eastern. Subdivisions The municipal unit Aitoliko is subdivided into the following communities (constituent villages in brackets): Aitoliko (Aitoliko, Agios Nikolaos, Kefalovryso, Mesa Pigadi, Bouza, Nisaki, Poros, Chaliki) Agios Ilias Stamna (Stamna, Kefalovrysos, Stathmos Stamnas) Fragkoulaiika (Fragkou, Koulaiika) Chrysovergi (Chrysovergi, Giatsaiika) Historical population Aitoliko has primary schools, a High School (first three years of secondary education), a Lyceum (the second three-year period of secondary education), several churches, a small post office and a central square. The geography has rocky bushy hills to the east and farms along with some grasslands and swamps as far as the Achelous to the west. The Aitoliko Lagoon is a lagoon located east of Aitoliko surrounding the main municipality and is 14 km² in area. 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. 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. The delta and the lagoons The Achelous delta to be found west of Mesolonghi is the most extensive delta in Greece. The Mesolonghi lagoon is one of the largest lagoons of the entire Mediterranean sea with its depth of 1.5 m. It is separated from the Gulf of Patras while its sea water is renewed from the Gulf, while the Aitolikon lagoon is a little deeper at 30 m deep. Of economic importance is the saltworks located to the east next to the old GR-5 (Agrinion - Mesolonghi) about 100