Guillaume Oyônô Mbia (2 March 1939 – 10 April 2021) was a Cameroonian writer.

Mbia was born in 1939 in Zoétélé in Cameroon's South Region.

[1] He finished secondary school in 1961 and began studying English in the United Kingdom, where he earned a bachelor's degree in 1969.

[2] Upon his return to Cameroon, he became an assistant in English department of the Faculty of Letters and Human Sciences of the University of Yaoundé.

Guillaume Oyônô Mbia died in Yaoundé on 10 April 2021 at the age of 82.