Spartacus (Greek: Σπάρτακος Spártakos; Latin: Spartacus; c. 103–71 BC) was a Thracian gladiator who, along with Crixus, Gannicus, Castus, and Oenomaus, was one of the escaped slave leaders in the Third Servile War, a major slave uprising against the Roman Republic. Little is known about him beyond the events of the war, and surviving historical accounts are sometimes contradictory. All sources agree that he was a former gladiator and an accomplished military leader.

This rebellion, interpreted by some as an example of oppressed people fighting for their freedom against a slave-owning oligarchy, has provided inspiration for many political thinkers, and has been featured in literature, television, and film. The philosopher Voltaire described the Third Servile War as "the only just war in history". Although this interpretation is not specifically contradicted by classical historians, no historical account mentions that the goal was to end slavery in the Republic.