Ilesa is a historic city located in Osun State, southwest Nigeria; it is also the name of the capital of a historic state-kingdom centred around th…Ilesa is a historic city located in Osun State, southwest Nigeria; it is also the name of the capital of a historic state-kingdom centred around that town as the capital. The state is ruled by a highly revered first class monarch who is one of the most prominent monarchs of the Yoruba Race and Nigeria at large bearing the title of His Imperial Majesty, the Owa Obokun Adimula of Ijesaland. The city of Ilesa consists of Ilesa itself and a number of surrounding cities.