David Arthur Waller (born 10 June 1961) is an English Bishop of the Roman Catholic Church.

[1] In addition to his parish ministry, he was a member of the House of Clergy in the General Synod of the Church of England from 2005 to 2010.

[5] He was ordained as Catholic deacon on 14 May 2011 and as a priest on 11 June 2011, both times by Thomas McMahon, Bishop of Brentwood.

[5] He was parochial administrator of St John the Baptist church, Ilford, from 2011 to 2015, and then parish priest of Christ the King, Chingford, from 2015 to 2024.

[13][3] The following day, on 23 June 2024, he took canonical possession of the Ordinariate and was installed as its bishop-ordinary at Church of Our Lady of the Assumption and St Gregory, Westminster.