Lamidi Olayiwola Adeyemi III (15 October 1938 – 22 April 2022) was the Alaafin, or traditional ruler, of the Yoruba town of Oyo and rightful heir to the throne of its historic empire.

Lamidi's father, the Alaafin of Oyo Oba Adeyemi II Adeniran, was deposed and exiled in 1954 for sympathizing with the National Council of Nigerian Citizens (NCNC).

Lamidi Adeyemi succeeded Alaafin Gbadegesin Ladigbolu II in 1970, during the governorship of Colonel Robert Adeyinka Adebayo, after the end of the Nigerian Civil War.

It was said that the measure, introduced by the state assembly with the People's Democratic Party (PDP) majority, was in response to the Oba's support for the Action Congress of Nigeria (ACN) during the April 2011 elections.

This is not only in social values of veracity, egalitarianism, justice and democracy; but in dress, utterances and comportment; even the mere necessary trivialities that mark Nigeria and the locality as a distinctive entity".

[18][16] His death was announced on several major Nigerian news networks on the morning of the next day, where his remains had already been returned to Oyo for the initial traditional rites which begins with the slaughtering of a goat at the entrance of the palace, called Oju Abata, to indicate the passing of the monarch.