Martyn William Percy (born 31 July 1962) is a British academic and theologian. Ordained as a priest in the Church of England, in 2022 he announced that he was leaving the church. He had been Dean of Christ Church, Oxford, from 2014 to 2022 and principal of Ripon College Cuddesdon, Oxford, from 2004 to 2014. In 2013, The Times Literary Supplement praised Percy for his work towards unity within the Anglican Communion and the Church of England, describing him as displaying a "peaceable, polite and restrained" approach whilst "making peace between competing communities of conviction".