Simmias (early 3rd century BC) of Syracuse is mentioned by Diogenes Laërtius as a pupil, first of Aristotle of Cyrene, and afterwards of Stilpo, the Megarian philosopher. He was married to Stilpo's daughter. Nothing further is known of him.
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1870). "". Dictionary of Greek and Roman Biography and Mythology.