The history of Köyceğiz is BC. It dates back to 3400 BC. The first civilization to exist in this region is the Koreans. Then, Scythians, Assyrians, Ionians, Dorians, Achaeans, Persians, Hellenes, Seleykos, Romans, Seljuks, Menteşeoğulları and Ottomans dominated the region.

The first information about the history of Koycegiz is provided by historian Herodotus, Geographer Strabon and British archaeologist Hoskin.

B.C. With the arrival of the Greeks and Achaeans to the Aegean coasts by sea in 2000, new colonies were established on the coast, and development was achieved with the colonies of the Carians in the interior. Thus, the district BC. It has reached a very good position in 1000 years. The city of Caunos, where Köyceğiz Lake joins the Mediterranean, has become one of the important harbors and trade centers of Caria. Akrapol, famous shrines and Ruin and Susan Castles are important historical artifacts.