Syros, also known as Siros or Syra, is a Greek island in the Cyclades, in the Aegean Sea. It is 78 nautical miles south-east of Athens. The area of the island is 83.6 km² and at the 2021 census it had 21,124 inhabitants.
The largest towns are Ermoupoli, Ano Syros, and Vari. Ermoupoli is the capital of the island, the Cyclades, and the South Aegean. It has always been a significant port town, and during the 19th century it was even more significant than Piraeus. Other villages are Galissas, Foinikas, Pagos, Manna, Kini, Azolimnos and Poseidonia.
