Petra is a former municipality on the island of Lesbos, North Aegean. It is located at the northwest of Lesbos and comprises the villages Petra, Skoutaros, Stypsi, Lafionas, Ypsilometopo and the settlements Petri and Anaxos. The town Mithymna is approx.
6 km to the north. The municipality has a land area of 72.479 km² and a population of 3,358 people.