Baron Moyne, of Bury St Edmund in the County of Suffolk, is a title in the Peerage of the United Kingdom. It was created in 1932 for the Conservative politician the Hon. Walter Guinness. A member of the prominent Guinness brewing family, he was the third son of Edward Guinness, 1st Earl of Iveagh, third son of Sir Benjamin Guinness, 1st Baronet, of Ashford. His son, the second Baron, was a poet and novelist, and the first husband of Diana Mitford, one of the famous Mitford sisters. As of 2010[update] the title is held by their eldest son, the third Baron, who succeeded in 1992. As a descendant of both the first Earl of Iveagh and the first Guinness Baronet of Ashford, he is also in remainder to these two titles.
The writer the Hon. Desmond Guinness is the second son of the second Baron and the younger brother of the third Baron Moyne.
The heir apparent is the present holder's second but eldest surviving son the Hon. Valentine Guinness (b. 1959)