Poros is a small Greek island-pair in the southern part of the Saronic Gulf, about (31 nautical miles) south from Piraeus and separated from the Peloponnese by a wide sea channel, with the town of Galatas on the mainland across the strait. Its surface area is about and it has 3,780 inhabitants. The ancient name of Poros was Pogon. Like other ports in the Saronic, it is a popular weekend destination for Athenian travellers.