Sermylia (Greek, Ancient (to 1453);: Σερμυλία),[1] or Sermyle (Σερμύλη), was a town of Chalcidice, between Galepsus and Mecyberna, which gave its name to the Toronaic Gulf, which was also called Sermylicus Sinus (κόλπος Σερμυλικός - kolpos Sermylikos). Pseudo Scylax writes that it was a Greek city.[2] It was a member of the Delian League.[3]
The site of Sermylia is near the modern Ormylia.