Antandrus was an ancient Greek city on the north side of the Gulf of Adramyttium in the Troad region of Anatolia. Its surrounding territory was known in Greek as (Antandria), and included the towns of Aspaneus on the coast and Astyra to the east. It has been located on Devren hill between the modern village of Avcilar and the town of Altinoluk in the Edremit district of Balikesir Province, Turkey.