Silanion (gr. Σιλανίων), a Greek sculptor of the 4th century BC.
He was noted as a portrait-sculptor. Of two of his works, his heads of Plato and of Sappho, we possess what seem to be copies. Both are of simple ideal type, the latter of course not strictly a portrait, since Sappho lived before the age of portraits. The best copy of the Plato is in the Vatican.