Kea, also known as Gia (Κέα / Τζια in Greek) is an island of the Cyclades archipelago, in the Aegean sea, in Greece. It is the island of the Cyclades complex that is closest to Attica (about 1 hour by ferry from Lavrio). Its climate is arid and its terrain is hilly. It's capital, Ioulis , is inland at a high altitude (like most ancient Cycladic settlements, for the fear of pirates) and is considered quite picturesque. Other major villages of Kea are Korrisia (the port) and Vourkari (a fishing village). After suffering depopulation for many decades, Kea has been recently rediscovered by Athens city dwellers as a convenient destination for weekends and yachting trips.

Kea was the home of Simonides of Ceos, an ancient Greek lyric poet.