The history of Sparta describes the history of the ancient Doric Greek city-state known as Sparta from its beginning in the legendary period to its incorporation into the Achaean League under the late Roman Republic, as Allied State, in 146 BC, a period of roughly 1000 years. Since the Dorians were not the first to settle the valley of the Eurotas River in the Peloponnesus of Greece, the preceding Mycenaean and Stone Age periods are described as well. Sparta went on to become a district of modern Greece. Brief mention is made of events in the post-classical periods.

The Battle of Leuctra was fought on 6 July 371 BC between the Boeotians led by the Thebans, and the Spartans along with their allies amidst the post–Corinthian War conflict. The battle took place in the vicinity of Leuctra, a village in Boeotia in the territory of Thespiae. The Theban victory shattered Sparta's immense influence over the Greek peninsula, which Sparta had gained with its victory in the Peloponnesian War a generation earlier.