Hadrianotherae or Hadrianutherae or Hadrianoutherai () was a town of ancient Mysia, on the road from Ergasteria to Miletopolis. It was built by the emperor Hadrian to commemorate a successful hunt which he had had in the neighbourhood. Coins from this town issued during the reign of Hadrian onwards are preserved. It seems to have been a place of some note; for it was the see of a bishop, and on its coins a senate is mentioned. No longer a residential see, it remains a titular see of the Roman Catholic Church.
Its site is located near Balñkesir in Asiatic Turkey.