In Greek mythology, Stentor (Greek: Στέντωρ; gen.: Στέντορος) was a herald of the Greek forces during the Trojan War. He is mentioned briefly in Homer's Iliad, in which Hera tells Stentor to encourage the Greeks to fight; Homer says his "voice was as powerful as fifty voices of other men".
Elsewhere, Stentor is said to have died after losing a shouting contest with Hermes.
Stentor's story is the origin of the term "", meaning loud-voiced, for which he was famous. Aristotle uses the concept in his Politics Book 7, Chapter IV saying, "For who can be the general of such a vast multitude, or who the herald, unless he have the voice of a Stentor?"