Donaldson Oladipo Diya (born 3 April 1944) is a retired Lt. General in the Nigerian Army. He was appointed Military Governor of Ogun State from January 1984 to August 1985. As Chief of the General Staff, he was the de facto Vice President of Nigeria during the Sani Abacha military junta
Donaldson Oladipo Diya was born on 3 April 1944 at Odogbolu, Ogun State, then Western Region, Nigeria. He was educated at the Methodist Primary School, Lagos, the Odogbolu Grammar School, and then at the Nigerian Defence Academy, Kaduna. He later attended the US Army School of Infantry, the Command and Staff College, Jaji (1980–1981) and the National Institute for Policy and Strategic Studies, Kuru. While serving in the military, Diya studied Law at Ahmadu Bello University, Zaria, where he obtained an LLB degree, and then at the Nigerian Law School, where he was called to bar as Solicitor and Advocate of the Supreme Court of Nigeria.
Oladipo Diya became Commander 31, Airborne Brigade. He was appointed Military Governor of Ogun State from January 1984 to August 1985. He became General Officer Commanding 82 Division, Nigeria Army in 1985. General Oladipo Diya was Commandant, National War college (1991–1993) and then was appointed as Chief of Defence Staff. He was appointed Chief of General Staff in 1993 and Vice Chairman of the Provisional Ruling Council in 1994.