The Peloponnese region (Greek: ΠεριφÝρεια ΠελοποννÞσου), is a region in southern Greece. It borders the West Greece region to the north and Attica to the north-east. The region has an area of about 15,490 km². It covers most of the Peloponnese peninsula, except for the northwestern subregions of Achaea and Elis which belong to West Greece and a small portion of the Argolid peninsula that is part of Attica.
The Peloponnese region was established in the 1987 administrative reform. With the 2010 Kallikratis plan, its powers and authority were redefined and extended. Along with the West Greece and the Ionian Islands regions, it is supervised by the Decentralized Administration of the Peloponnese, Western Greece and the Ionian Islands based at Patras. The region is based at Tripoli and is divided into five regional units (pre-Kallikratis prefectures), Arcadia, Argolis, Corinthia, Laconia and Messenia, which are further subdivided into 26 municipalities. The largest city of the region is Kalamata.
Athens (Greece), Hersonissos (Chersonissos), Malia, Chania, Rethymno, Iraklio (Heraklio) Crete, Santorini, Mykonos (Myconos), Rhodes, Kos, Lesvos, Corfu, Samos, Zakynthos and other popular destinations in the Greek islands, as well as Halkidiki, Thessaloniki and other parts of mainland Greece.