Serifos is a Greek island, located in the western Cyclades. It is located about 170 kilometres (92 nautical miles) ESE of the Athenian port of Piraeus.

In Greek mythology, Serifos is where Danae and her infant son Perseus washed ashore after her father Acrisius, in response to an oracle that his own grandson would kill him, set them adrift at sea in a wooden chest. When Perseus returned to Serifos with the head of the Gorgon Medusa, he turned Polydektes, the king of Serifos, and his retainers into stone as punishment for the king’s attempt to marry his mother by force.