The Peloponnese region , 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.