Attica (Greek: Περιφέρεια Αττικής, romanized: Periféria Attikís, [periˈferi.a atiˈcis]) is an administrative region of Greece, that encompasses the entire Athens Metropolitan area, the country’s capital and largest city. The region is coextensive with the former Attica Prefecture of Central Greece and covers a greater area than the historical region of Attica.
Located on the eastern edge of Central Greece, Attica covers about 3,808 square kilometers. In addition to Athens, it contains within its area the cities of Elefsina, Megara, Laurium, and Marathon, as well as a small part of the Peloponnese peninsula and the islands of Salamis, Aegina, Angistri, Poros, Hydra, Spetses, Kythira, and Antikythera. About 3,800,000 people live in the region, of whom more than 95% are inhabitants of the Athens metropolitan area. In 2019, Attica had the HDI of 0.912, the highest in Greece.
The region was established in the 1987 administrative reform, and until 2010 it comprised the 4 prefectures of Athens, East Attica, Piraeus and West Attica.
With the 2010 Kallikratis plan, the region’s powers and authority were completely redefined and extended. Since 1 January 2011, the region represents the second-level local administration. While being supervised by the Decentralized Administration of Attica, it is now an independent self-governing body with powers and a budget comparable to the former prefectures.
The region is subdivided into eight subordinate regional units:
The Attica region consists of eight electoral districts: Athens A, Athens B1, Athens B2, Athens B3, Piraeus A, Piraeus B, East Attica and West Attica.