Alonnisos, also transliterated as Alonissos or Alonisos, is a Greek island in the Aegean Sea. After Skiathos and Skopelos it is the third member of the Northern Sporades. Alonnisos is also the name of a village on the island, as well as the municipality that encompasses the island and the village. The village of Alonnisos is located on the southern part of the island. It is locally known as Chora. The main port of the island is located in the southeast and is called Patitiri.