In Greek mythology, Carnus (also spelled Carneus and Carneius) (Ancient Greek: Κάρνος) was a seer from Acarnania, who was instructed in the art of divination by Apollo. According to the poet Praxilla, he was a son of Europa, who was brought up by Apollo and Leto.^[1] Alternatively, he was Apollo's lover and friend in some accounts.^[2]

Carnus accompanied the Heracleidae, and was killed by Hippotes with a spear for giving obscure prophecies. Apollo then struck the Dorians with plague; having consulted an oracle, they banished Hippotes from their camp and established a cult of Apollo Carneius to propitiate the god.^[3]