Eupolis (flourished 5th century bc, Athens) was one of the leading Athenian poets of the vigorous and satirical Old Comedy, and a rival of Aristophanes.
Eupolis grew up during the Peloponnesian War between Athens and Sparta, and his first play was produced in 429 bc. Of his work 19 titles and more than 460 fragments survive. Objects of his satire included the demagogues Cleon and Hyperbolus and the wealthy Callias and Alcibiades and their fashionable circle. In his last play, The Demes, written just after the disastrous Athenian expedition led by Alcibiades to Sicily (412 bc), he addressed himself with patriotic fervour to the problem of how the fortunes of Athens were to be restored. He died young, about 410 bc, probably on active service at the Hellespont.