William Hubert Dunn (8 July 1933 – 27 February 2020) was a Northern Ireland-born English senior barrister and judge, who held national offices in the areas of mental health and immigration, including that of Chief Immigration Adjudicator of the UK. A leader in a youth charity for many years, later in life he researched and authored a study of the life and work of the Irish poet Francis Ledwidge.