Dinon of Colophon was a Greek historian of the 4th century BCE. He is known primarily as the father of the historian Cleitarchus, who chronicled Alexander the Great. No further biographical details survive.

His sole known work is the Persica, a history of Persia in at least three books spanning from legendary times to the reign of Artaxerxes III Ochus. The text is lost and survives only in fragments preserved by later authors.

Dinon served as a major source for later historians writing on Persia. Plutarch relied on his Persica for the Life of Artaxerxes, and it likely informed other writers, including his son. Alongside Ctesias of Cnidus, Dinon represents a key strand of Greek historiography focused on the Persian Empire, with his work generally considered more reliable. The fragments provide valuable, though indirect, information on Persian customs and court history.