For the Roman era writer, see Pomponius Porphyrion.

In Greek mythology, Porphyrion was a giant, one of the sons of Uranus and Gaia. He attempted to rape Hera. Hera set him against Dionysus, promising the giant Hebe's hand in marriage if he would defeat the god. He was killed when Zeus smote him with lightning and Heracles finally shot him with an arrow.