Patroklos (Greek: Πάτροκλος) or Gaidouronisi is a small, private island located in the Saronic Gulf, Greece. It is situated about 65 km from Athens and 3 km from Sounion and is part of the Attica region. In ancient times, the island was known as Patroklou Charax or Kopros. It was also the island at the heart of the Greek island affair.
Coordinates: 37°39′02.50″N 23°57′01.50″E / 37.6506944°N 23.9504167°E / 37.6506944; 23.9504167 (Patroklos Island)