The Diadochi (plural of Latin Diadochus, from Greek Diadokhoi, "successors") are the rival successors of Alexander the Great, and their Wars of the Diadochi follow Alexander's death.

This is the beginning of the Hellenistic period of Greek history, the time when many people who are not Greek themselves adopt Greek philosophy and styles, Greek urban life, and aspects of the Greek religion.

The Diadochi are also referred to as Epigonoi, “offspring.”