The Ogiso were the earliest known ruling monarchy of the Edo kingdom of Igodomigodo, founded by Igodo, the first Ogiso. The monarchy began around 900 AD and lasted until the early 12th century when it was succeeded by the Oba monarchy. The Ogiso monarchy influenced the early sociopolitical structure of the region by introducing centralised governance and laying the foundations for the Benin Empire.
Throughout its existence, the Ogiso monarchy had thirty-one rulers and notable among them were Ogiso Igodo, the first ruler, and Ogiso Ere, who implemented several administrative and cultural reforms. This era saw the establishment of settlements, the integration of various chiefdoms, and the growth of proto-urban centers, with Udo and Benin City being prominent examples.
