Hegesinus was a Greek epic poet who lived during the 3rd century BCE, a period known as the Hellenistic Age. Almost nothing is known about his personal life. He is sometimes identified with a philosopher named Hegesinus of Salamis, who was a teacher in Athens, but this connection is uncertain because ancient sources do not call that philosopher a poet.

He is known for a single work, an epic poem called the Atthis, which narrated the history and myths of the Attic region, the area around Athens. The poem itself is lost and survives only as a title mentioned by the later travel writer Pausanias.

According to modern scholars, Hegesinus’s significance lies in his participation in a broader literary trend of his time. In the Hellenistic period, poets often wrote learned, antiquarian epics focused on local histories and foundation stories, a genre sometimes called epic chorography. His Atthis likely served as a source for later writers collecting regional myths. Because his work does not survive, his specific poetic style and contributions cannot be evaluated further.