Hilary Jane Williams, Baroness Williams of Oystermouth (née Paul; born 4 March 1957), is an English Anglican theologian and writer.
Williams was born on 4 March 1957 in Trivandrum, India, one of five sisters. Her father, Geoffrey Paul, former Bishop of Bradford, was then serving as a missionary priest at Palayamkottai and later Kerala. Her father was a member of the faculty and later became the principal of the Kerala United Theological Seminary at Kannammoola, where she spent part of her childhood. She studied theology at Clare College, Cambridge, and then worked in theological publishing and education. For three years she wrote a Sunday readings column for the Church Times (published by SPCK as Lectionary Reflections) and now works part-time for Redemptorist Publications, as a visiting lecturer at King's College London. She is assistant dean and lecturer at St Mellitus College (formerly St Paul's Theological Centre) in London.
Williams has been married since July 1981 to Rowan Williams, who was appointed as the 104th Archbishop of Canterbury in 2002. They have a daughter named Rhiannon (born 1988) and a son named Pip (born 1996). Following her husband's retirement as Archbishop of Canterbury and his subsequent peerage, Williams is entitled to the style and title of Lady Williams of Oystermouth.