Agios Georgios or San Giorgio (Greek: Άγιος Γεώργιος) is a Greek uninhabited island in the entry of Saronic Gulf. It’s the largest uninhabited island of the Saronic Islands with an area of 4.3 km2.
The island belongs to Lavreotiki municipality. There is a wind power park on the island.
In antiquity the island was named Velvina (Belbina) and it is mentioned
by Herodotus in a dialogue between Themistocles and his political
opponent Timodemos from Afidnes.
Though some scholars have proposed that Agios Georgios should be
identified as the ancient Psyttaleia which was involved in the Battle of
Salamis, the consensus remains with the island that has long been known
as Lipsokoutali, now renamed Psyttaleia.