Michael Onajirevbe Ibru (25 December 1930 – 6 September 2016) was a Nigerian businessman from Agbara-Otor, Delta State. He was the head of the Ibru Organization, one of the largest conglomerates in Nigeria. As a traditional chieftain of his homeland, Ibru bore the tribal honorific Olorogun and often used it as a pre-nominal style. This title is also borne by many of the members of his large family in the same way.