Thrax or Thraex (Latin borrowing of Ancient Greek Θρᾷξ "Thracian") may refer to:
Historical figures: Dionysius Thrax ( 170-90 BC), a Hellenistic grammarian Maximinus Thrax ( 173–238), Roman emperor from Moesia Leo I (emperor) Eastern Roman emperor Justin I Eastern Roman emperor Thrax (mythology), a child of Ares "Thrax" (song), a 2021 song by SSGKobe Thrax, a character in the television series Exosquad Thrax, a virus and the main antagonist in the film Osmosis Jones Thrax (Power Rangers), a villain from the 15th anniversary episodes of Power Rangers Thrax, the City of Windowless Rooms from The Book of the New Sun novel series by Gene Wolfe Thrax Punks, a Greek band
See also Anthrax, a bacterial infection Thraex, a type of Roman gladiator