Syrianus was a Greek Neoplatonist philosopher, and head of the school at Athens in succession to Plutarch.

He is important as the teacher of Proclus, and, like Plutarch and Proclus, as a commentator on Plato and Aristotle. His best-known extant work is a commentary on the Metaphysics of Aristotle. He is said to have written also on the De coelo and the De interprelatione of Aristotle and on Plato's Timaeus. A treatise on the Staseis of Hermogenes was published under his name by Walz in 1833. His views were identical with those of Proclus, who regarded him with great affection and left orders that he should be buried in the same tomb.

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