Colophon (; ) was an ancient city in Ionia. Founded around the turn of the first millennium BC, it was likely one of the oldest of the twelve cities of the Ionian League. In ancient times it was located between Lebedos (120 stadia to the west) and Ephesus (70 stadia to its south). Today the ruins of the city can be found south of the town Degirmendere Fev in the Menderes district of Izmir Province, Turkey.