Margaret Barker (born 1944) is a British Methodist preacher and biblical scholar. She studied theology at the University of Cambridge, after which she has devoted her life to research in ancient Christianity. She has developed an approach to biblical studies known as Temple Theology.

She was president of the Society for Old Testament Study in 1998 and in July 2008 she was awarded the Lambeth degree of Doctor of Divinity by the Archbishop of Canterbury.

According to her, Sola Scriptura - the doctrine that the Bible is the supreme authority in all matters of doctrine and practice - has hindered rather than helped the understanding of Christianity.

What did "Son of God," "Messiah," and "Lord," mean to the first Christians when they used these words to describe their beliefs about Jesus? In this book Margaret Barker explores the possibility that, in the expectations and traditions of first-century Palestine, these titles belonged together, and that the first Christians fit Jesus' identity into an existing pattern of belief. She claims that pre-Christian Judaism was not monotheistic and that the roots of Christian Trinitarian theology lie in a pre-Christian Palestinian belief about angels--a belief derived from the ancient religion of Israel, in which there was a "High God" and several "Sons of God." Yahweh was a son of God, manifested on earth in human form as an angel or in the Davidic King. Jesus was a manifestation of Yahweh, and was acknowledged as Son of God, Messiah, and Lord. Barker relies on canonical and deutero-canonical works and literature from Qumran and rabbinic sources to present her thoughtful investigation.