The Kingdom of Benin or Empire of Benin, also known as Great Benin, is a traditional kingdom in southern Nigeria. It has no historical relation to the modern republic of Benin, which was known as Dahomey from the 17th century until 1975. The Kingdom of Benin's capital was Edo, now known as Benin City in Edo State, Nigeria. The Benin Kingdom was one of the oldest and most developed states in the coastal hinterland of West Africa. It grew out of the previous Edo Kingdom of Igodomigodo around the 11th century AD; it was annexed by the British Empire in 1897, but endured as a non-sovereign monarchy.

In the 15th and 16th centuries, the empire reached the height of its prosperity, expanding its territory, trading with European powers, and creating a remarkable artistic legacy in cast bronze, iron, brass, carved ivory, and other materials.

By the 1st century BC, the Benin territory was partially agricultural; and it became primarily agricultural by around A.D. 500, but hunting and gathering of animals still remained important. Also by A.D. 500, iron was in use by the inhabitants of the Benin territory.

Benin City (formerly Edo) sprang up by around A.D. 1000, and was located in a forest that could be easily defended. The dense vegetation and narrow paths made the city easy to defend against attacks. The rainforest helped in the development of the city because of its vast resources that could be exploited – fish from rivers and creeks, animals to hunt, leaves for roofing, plants for medicine, ivory for carving and trading, and wood for boat building. However, domesticated animals could not survive due to a disease spread by tsetse flies; after centuries of exposure, some animals, such as cattle and goats, developed a resistance to the disease.

The earliest organized polity in the region that would become Benin was Igodomigodo, which coalesced from existing autonomous communities in the late 1st millennium CE. The ruler was called Ogiso – the ruler of the sky. The Egiso were responsible for putting in place many of the cultural and social traditions that have shaped Benin up to the present.

Around the 13th century CE, Ogiso Owodo was overthrown by the people of Benin after a tumultuous and incompetent reign. In his place they chose Evian, a popular and powerful Ogifa, earth-priest and chief of the local Efa people, as okaevbo or head of state. Evian's later attempt to pass power to his son Ogiamwen, thereby creating a new royal dynasty, was resisted. The Edionevbo (ruling council of chiefs) refused to sanction the move, and sent emissaries requesting that a prince of Ile-Ife restore order and legitimacy to their throne.

Historical traditions in Benin diverge on the details of these events. The 'official' tradition records that Oranmiyan, son of Oduduwa, accepted the council's invitation; his arrival marked the beginning of the new dynasty and the establishment of the title "Oba" for the rulers of Benin. This version serves as a 'stock narrative' used by the leaders of the Ife Empire to explain and justify the expansion of their cultural and economic sphere of influence into Igodomigodo during this period.

Another tradition, first recorded in the 1970s, provides a different story. While several versions exist, they all argue that the founding Oba was not a Yoruba but was instead the son or grandson of Ogiso Owodo, natives of Benin who were in exile in Ife. Some go further, claiming that Owodo's son Ekaladerhan and Oduduwa are the same person, and therefore that the Edo were responsible for the foundation or organization of Ile-Ife. Historians generally see these alternative accounts as recent inventions or distortions of older historical traditions in response to the dynamics of modern Nigerian society.