The Aegean Sea is an inland sea of the Mediterranean, between Europe and Asia. It extends south to Crete Dardanelles Strait to the north, and between Greece to the west and Turkey to the east.
The North Aegean is one of the thirteen peripheries (regions) of Greece.
It is currently divided into five regional districts, organized around the islands of Chios, Ikaria, Lemnos, Lesvos and Samos.
It was divided before Kallikratis 2010 program in three prefectures: the prefecture of Lesbos (including Lemnos), the prefecture of Samos (Ikaria and comprising Supplied) and the prefecture of Chios (with Psara and Antipsara). Since Kallikratis 2011 program, this region is also part of the Diocese of decentralized Aegean.