Professor Oyenuga was born on April 9, 1917, at Isonyi, a town in the city of Ijebu Ode, Ogun State, southwestern Nigeria by late Prince Thomas Oyenuga. He attended Emmanuel Primary School in Ado Ekiti, Emmanuel Primary School before he was admitted into Wasinmi African Church Secondary School, Ijebu Ode.
He began his career in 1935 as a classroom teacher at Teacher Anglican Church Mission, Ijebu. He later joined the University of Ibadan as an academic staff in the department of Animal Nutrition where he rose to the position of a Senior Lecturer in 1958, the same year he was appointed head of department agricultural chemistry, a position he held for three years.
In 1961, he became a Professor of Obafemi Awolowo University where he served as head of department of Agriculture.
In 1972, he was appointed Deputy Vice Chancellor of the University of Ibadan, a. Position he held 1976 and in 1979, he became the first Emeritus Professor of the University of Ibadan.[6]
In 1992, he was appointed a Pro-Chancellor and Chairman Governing Council, University of Port Harcourt.
[7]
On April 11, 1950, Victor Adenuga Oyenuga married Sabinah Babafunmike Oyenuga (Nee Onabajo). They had five (5) children, three sons and two daughters.[9]