Hilary Jane Williams, Lady Williams of Oystermouth (née Paul; born 1957), is an English Anglican theologian and writer.

Williams was born on 4 March 1957^[1] in Trivandrum, India, one of five sisters.^[2] Her father, Geoffrey Paul, former Bishop of Bradford, was then serving as a missionary priest at Palayamkottai and later Kerala.^[3] 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.^[4] 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.^[5]

Williams has been married since July 1981 to Rowan Williams,^[6] 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).^[7] 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.