Izmir is a province of Turkey in Western Anatolia on the Aegean coast, whose capital is the city of Izmir. In the west, it is surrounded by the Aegean sea, and it encloses the Gulf of Izmir. Neighbouring provinces are Balıkesir on the north, Manisa on the east, and Aydın on the south.
The area was first settled by Ionian Greeks in about the 11th century BC, who established the city of Smyrna, now Izmir city. It was later conquered by the Persians, retaken by the Greeks, before being subsumed into the Roman Empire. After the split of the Roman Empire, the area became part of the Byzantine Empire until conquered by the Ottoman Turks in the 14th century. Following the First World War, the province was occupied by Greece, but was retaken by the forces of Mustafa Kemal Atatürk in the Turkish War of Independence.