In Greek mythology, Polynices (also Polyneices) (; Ancient Greek: Πολυνείκης, romanized: Polyneíkes, lit. 'manifold strife' or 'much strife') was the son of Oedipus and either Jocasta or Euryganeia, and the brother of Eteocles, Antigone, and Ismene. When Oedipus discovered that he had killed his father and married his mother, he blinded himself and left Thebes, leaving Polynices and Eteocles to rule jointly. However, due to a curse placed upon them by Oedipus, their agreement quickly fell apart, and a war for the kingdom ensued. During battle, the brothers killed one another.
Polynices is a central character in the Theban Cycle, a set of stories famous in ancient Greece. He is most well-known from three 5th century BC tragic plays by Sophocles known as the Three Theban Plays: Oedipus Rex, Oedipus at Colonus, and Antigone, with his death and burial being the main driver of the plot of Antigone. He also features prominently in the Thebaid, Aeschylus' play Seven Against Thebes, and Statius' Thebaid. The story and his character was also of interest to ancient Greek philosophers, and was discussed by Aristotle, Plato, and Epictetus.