The Dittaino (Greek: Χρύσας; Latin: Chrysas) is a river of central Sicily which rises in the Heraean Mountains, not far from the modern towns of Gangi and Enna. It is 105 kilometres (65 mi) long.

After flowing through the territory of Assorus, where its tutelary divinity was worshipped with peculiar honors during the Greek civilization, and afterwards through that of Agyrium, it joins the Simeto in the plain of Catania, about 30 kilometres (19 mi) from its mouth.

The modern name is the Sicilian version of Arab vocable Wādī al-tīn, namely "The River of Sandstone".