Gorgonius or Gorgon (Greek: Ἅγιος Γοργόνιος Νικομηδείας) was a Christian who was martyred in AD 304 alongside Peter Cubicularius and a certain Dorotheus at Nicomedia during the Diocletianic Persecution.

The first to be exposed was Diocletian's butler, Peter, surnamed Cubicularius ("valet, chamberlain"), who was strung up, his flesh torn from his bones.

Two Christians, Dorotheus, an imperial chamberlain, and Gorgonius, an army officer, protested this treatment, and were also martyred, together with another official, named Migdonius.

In the meantime, Peter was boiled or burned alive,[2] or “roasted on a gridiron.”[3] Diocletian, determined that their bodies should not receive the honors which the early Christians gave the relics of the martyrs, ordered them to be thrown into the sea.

[10] Epigram 24 of Pope Damasus I Translation: This martyr's tomb beneath a great hilltop holds Gorgonius, guardian of the altars of Christ.

Whoever comes to seek here the thresholds of the saints will find that in the nearby dwelling abide the blessed whom likewise, as they went, piety bore to heaven.