Thestorus or Thestoros (Greek, Ancient (to 1453);: Θέστορος or Θέστωρος) was a town of the Chalcidice in ancient Macedonia. It probably belonged to the Delian League since it appears in the tribute records of Athens of 422/1 BCE,[1] but appears in no other extant tribute records.[2] It is cited in a fragment of Theopompus preserved by Stephanus of Byzantium, who states it belonged to Thrace.
Its site is in unlocated, but somewhere in Chalcidice close to the territory of Olynthus.[2]