Aegina is located in the center of the Saronic Gulf, surrounded by Agistri, Methana, Troizina, Poros and the coasts of mainland Attica. With a total area of 82.63 square kilometers is the second largest island in the Saronic Gulf. The length of its shores is 57 km and has the shape of an almost equilateral triangle. Its NE end is 10.5 nautical miles from the mouth of the port of Piraeus, its NW is 12 nautical miles from Trachili of Epidaurus and its N end is 9 nautical miles from the northern entrance of Poros.
Its soil is mainly volcanic with the northern areas consisting of sedimentary rocks and the southern ones eruptive.
It consists of low hills and some plains. The highest mountain is Mount with a height of 532 meters while it has no rivers and generally running water. The fauna of the island consists of turtles, hares, wild rabbits and foxes while the flora of wild olives, holly, phrygana, ramni and kisses.
The climate is Mediterranean and dry with limited rainfall.