Arcadia (Greek: Αρκαδία, romanized: Arkadía Modern Greek: [ɐr.kɐˈði.ɐ]) is one of the regional units of Greece. It is part of the administrative region of Peloponnese. It is situated in the central and eastern part of the Peloponnese peninsula. It takes its name from the mythological figure Arcas. In Greek mythology, it was the home of the god Pan. In European Renaissance arts, Arcadia was celebrated as an unspoiled, harmonious wilderness.

Arcadia is a rural, mountainous regional unit comprising about 18% of the land area of the Peloponnese peninsula. It is the peninsula's largest regional unit. According to the 2011 census, it has about 86,000 inhabitants; its capital, Tripoli, has about 30,000 residents in the city proper, and about 47,500 total in the greater metropolitan area.^[1]

Arcadia consists partly of farmland, and to a larger extent grassland and degenerated shrubland. It also has three mountain ranges, with forestation mainly at altitudes above 1000 meters: Mainalo, a winter ski resort, situated in the central north; Parnon in the central south; and Mount Lykaion, famous for the ancient history and myths associated with it, in the southwest.

Its climate features hot summers and mild winters in the east, the south, and those parts of the central area that are less than 1000 meters above sea level. Fall and winter are mostly rainy, except in the mountains to the west and north, Taygetus and Mainalo, which are snowy in winter.