Bishop William Wareing (14 February 1791 – 26 December 1865) was the first Roman Catholic Bishop of the Diocese of Northampton. Born at Lincoln's Inn Fields, London, and after studying at Oscott College, William Wareing was ordained as a Catholic priest on 28 September 1815, aged 24, by Bishops Thomas Walsh, Nicholas Wiseman (later Cardinal Wiseman) and George Hilary Brown. On 29 September 1850, aged 59, he was appointed the first Bishop of Northampton following the re-establishment of the Catholic Hierarchy.