Billy Joseph Stanley Oritsesaninomi Dudley (10 November 1931 - 23 December 1980) was a leading Nigerian political scientist, working mostly at the University of Ibadan (UI) , which he joined in 1959. Until late 1962, he was on the staff of the Extra Mural Department of UI, and from 1960 to 1962 he was based in Zaria, where he began the research that he later supplemented with research in London, England, during periods of leave in 1961, 1963, and 1965, each lasting several months. His resulting PhD was published in 1968 as Parties and Politics in Northern Nigeria. He became a Professor at UI in 1971 and Head of department in 1972.