Salamis, island, town, and dímos (municipality), Attica (Modern Greek: Attikí) periféreia (region), eastern Greece. The island lies in the Saronikós Gulf of the Aegean Sea, west of the city of Piraeus. The town is a port on the west coast of the island. On the east, between the island and the mainland, are the straits in which the Greeks won a decisive naval victory over the Persians in 480 bce. Pop. (2001) town, 24,446; municipality, 34,975; (2011) town, 25,370; municipality, 39,283.