Psathoura (Greek: Ψαθούρα) is a Greek island in the Northern Sporades. It is administratively a part of Alonnisos. As of 2011[update], it had no resident population. The Psathoura lighthouse, built in 1895, stands at 28.9 metres. It is one of the tallest in the Aegean. Its signal is a flash of one second every ten seconds. All of Psathoura is in Zone A2 of the Alonnisos Marine Park.
|Highest elevation||28.9 m (94.8 ft)|