Athanas (, 4th century BCE) of Syracuse was a historical writer who wrote a work on Sicily and Dion of Syracuse that continued the history of Philistus, and was quoted respectfully by the historians Plutarch and Diodorus Siculus.Plutarch, Parallel Lives, "Timoleon" 23, 37Diodorus Siculus, Bibliotheca historica xv. 94

He is probably the same as the writer named "Athanis" mentioned by the grammarian Athenaeus who also wrote a work on Sicily.Athenaeus, Deipnosophistae iii. p. 98Franz Göller, De situ et origine Syracusarum ad explicandam Thucydidis potissimum historiam scripsit atque Philisti et Timaei rerum Sicularum fragmenta adjecit, p. 16

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