William Norman Pittenger (July 23, 1905 – June 19, 1997) was an Anglican priest, teacher, and theologian. He wrote about and promoted process theology, and became one of the first acknowledged Christian defenders for the open acceptance of homosexual relations among Christians. He served as Vice-Chairman and the Chairman of the Theological Commission of the World Council of Churches from the mid-1950s through the early 1960s. He lived most of his life in the United States, though from 1966 until his death he lived at King's College at Cambridge University as an honorary member of the university.