In Greek mythology, Ismene is a Theban princess. She is the daughter and half-sister of Oedipus, king of Thebes, daughter and granddaughter of Jocasta, and sister of Antigone, Eteocles, and Polynices. She appears in several tragic plays of Sophocles: at the end of Oedipus Rex, in Oedipus at Colonus and in Antigone. She also appears at the end of Aeschylus' Seven Against Thebes.

Oedipus at Colonus is the second-last of the three Theban plays of the Athenian tragedian Sophocles. It was written shortly before Sophocles's death in 406 BC and produced by his grandson at the Festival of Dionysus in 401 BC.