It has a land area of 48.650 km²[3] and a population of 10,134 inhabitants (2021 census).

The seat of the municipality was the town of Gastouri (pop.

The municipality took its name from the palace Achilleion that Empress Elisabeth of Austria built there.

The largest communities are Gastouri, Kynopiastes, Viros, Perama, Benitses, Káto Garoúna, and Kastellánoi.

This Ionian Islands location article is a stub.