William Monk Gibbon (1896 – 29 November 1987) was an Irish poet and prolific writer, known as "The Grand Old Man of Irish Letters". His collection of over twenty volumes of poetry, autobiography, travel and criticism are kept at Queen's University Belfast. The Monk Gibbon fonds are kept at the University Archives, Queen's University at Kingston. The material consists of correspondence, drafts of his books, poems, photographs and news clippings. Correspondents include W.B. Yeats, other members of the Yeats family, George William Russell (A.E.), George Moore, John Eglinton and Padraic Colum. He also wrote many published novels, and has been characterised as "self-regarding and prickly".