Arcadius of Antioch was a Greek grammarian who flourished in the 2nd century AD. According to Suidas, he wrote treatises orthography and syntax, and an onomaticon (vocabulary), described as a wonderful production.

An epitome of the great work of Herodian of Syria on general prosody in twenty books, wrongly attributed to Arcadius, is probably the work of Theodosius of Alexandria or a grammarian named Aristodemus. This epitome was the work of a forger of the 16th century. though meagre and carelessly put together, it is valuable, since it preserves the order of the original and thus affords a Trustworthy foundation for its reconstruction.

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This article incorporates text from the 1911 Encyclopædia Britannica, which is in the public domain.