Hereas of Megara (Ἡρέας ὁ Μεγαρεύς) was a local historian from the city of Megara active in the 4th century BCE. No specific biographical details survive; he is known solely through later citations, primarily by Plutarch, who quotes him as a source for Megarian traditions [1][2]. His floruit is inferred from the nature of his work and these later references.

His only known work is the Megarika (Μεγαρικά), a local history of Megara. The work is lost and survives only in fragments preserved by later authors like Plutarch [1][2].

Hereas is significant as an early practitioner of local history (horography). His Megarika provided a valuable non-Athenian perspective on regional myths and historical disputes, such as the Megarian version of the myth of Theseus and Ariadne and the early history of the Salamis controversy [1][2]. As a fragmentary historian, he illustrates the diversity of competing local historical traditions in the Greek world.

Sources 1. Perseus Digital Library (Tufts University): http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0062%3Aentry%3Dhereas-harpers 2. ToposText: https://topostext.org/people/1390