Dennis Eric Nineham (27 September 1921 –) is a British theologian and academic, who served as Warden of Keble College, Oxford, from 1969 to 1979, as well as holding chairs in theology at the universities of London, Cambridge and Bristol.
Nineham was educated at King Edward VI School, Southampton, before studying at The Queen's College, Oxford. He was ordained as a priest in the Church of England. He served as Assistant Chaplain, and then Chaplain, at the college, before being appointed to a fellowship there in 1946. He was appointed Professor of Biblical and Historical Theology at King's College London in 1954, becoming Professor of Divinity at the University of London in 1958. In 1964, he was appointed Regius Professor of Divinity at the University of Cambridge, a post held in conjunction with a fellowship at Emmanuel College. He returned to Oxford in 1969, as Warden of Keble College, a post that he held until 1979; he was appointed to an honorary fellowship of Keble in the following year, and to an honorary fellowship of Queen's in 1991. Between 1980 and 1986, he was Professor of Theology and head of the theology department at the University of Bristol; he was also an honorary canon of Bristol Cathedral for this period.
His publications include The Study of Divinity (1960), The Gospel of Saint Mark (1963), The Use and Abuse of the Bible (1976) and Christianity Mediaeval and Modern (1993). He has also edited various theological works and contributed to others.