Choerilus (Greek: Χοιρίλος) was an Athenian tragic poet, who exhibited plays as early as 524 BC.
He was born in 546 BC. He died around 460 BC (about 86 years old)
Choerilus started writing tragedies when he was 22 years old. He staged 160 plays and won the prize 13 times. His works are all lost; only Pausanias mentions a play by him entitled Alope (a mythological personage who was the subject of dramas by Euripides and Carcinus). He lived in Athens for most of his life.
Choerilus was said to have competed with Aeschylus, Pratinas and even Sophocles. According to Friedrich Gottlieb Welcker, however, the rival of Sophocles was a son of Choerilus, who bore the same name. His reputation as a writer of Satyr plays is attested in the line:
The Choerilean metre (a catalectic hexameter), mentioned by the Latin grammarians, is probably so called because the above line is the oldest extant specimen. Choerilus was also said to have introduced considerable improvements in theatrical masks and costumes.