Dieuchidas of Megara (Διευχίδας ὁ Μεγαρεύς) was a 4th-century BCE historian from the city of Megara. He represents the Classical tradition of local historiography (horographoi), compiling his city's history from a Megarian perspective during a period of frequent rivalry with Athens [1].

His sole known work is the Megarika (Μεγαρικά), a history of Megara in at least four books. The text is lost, surviving only in fragments preserved by later authors like Athenaeus and Clement of Alexandria [1][2][3].

Dieuchidas is significant for providing a valuable non-Athenian viewpoint on regional history and myth. His rationalizing approach to myth is notable, as seen in a fragment where Apollo aids in building Megara's walls by lending his lyre to set a work rhythm, rather than through direct divine intervention. The Megarika covered foundation myths, early kings, rituals, and customs, often engaging in polemics to defend Megarian traditions against rival accounts [1][2][3].

Sources 1. Oxford Research Encyclopedia of Classics: https://oxfordre.com/classics/view/10.1093/acrefore/9780199381135.001.0001/acrefore-9780199381135-e-2183 2. Perseus Digital Library, entry in Smith's Dictionary of Greek and Roman Biography and Mythology: http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0104:entry=dieuchidas-bio-1 3. ToposText, fragmentary author entry: https://topostext.org/people/1449