Juno and the Paycock is a play by Seán O'Casey. Highly regarded and often performed in Ireland, it was first staged at the Abbey Theatre in Dublin in 1924. It is set in the working-class tenements of Dublin in the early 1920s, during the Irish Civil War period. The word "paycock" is the Irish pronunciation of "peacock", which is what Juno accuses her husband of being.

Seán O'Casey was an Irish dramatist and memoirist. A committed socialist, he was the first Irish playwright of note to write about the Dublin working classes.