Adramyttium (Greek: Άδραμύττιον Adramyttion, Άδραμύττειον Adramytteion, or Άτραμύττιον Atramyttion) was an ancient city and bishopric in Aeolis, in modern-day Turkey. It was originally located at the head of the Gulf of Adramyttium, at Ören in the Plain of Thebe, 4 kilometres west of the modern town of Burhaniye, but later moved 13 kilometres northeast to its current location and became known as Edremit.