Oyo is a city in Oyo State, Nigeria. It was founded as the capital of the remnant of the historic Oyo empire in the 1830s, and is known to its people as 'New Oyo' to distinguish it from the former capital to the north, 'Old Oyo' (Ọ̀yọ́-Ilé), which had been deserted as a result of the Yoruba Revolutionary Wars. Its inhabitants are mostly of the Yoruba people, and its ruler is the Alaafin of Oyo.

Oyo State is an inland state in southwestern Nigeria. Its capital is Ibadan, the third most populous city in the country and formerly the second most populous city in Africa. Oyo State is bordered to the north by Kwara State for 337 km, to the east by Osun State for 187 km, partly across the River Osun, and to the south by Ogun State, and to the west by the Republic of Benin for 98 km. With a projected population of 7,976,100 in 2022, Oyo State is the sixth most populous in the Nigeria.