Earl of Swinton is a title in the Peerage of the United Kingdom. It was created in 1955 for the prominent Conservative politician Philip Cunliffe-Lister, 1st Viscount Swinton. He had already been created Viscount Swinton, of Masham in the County of York, in 1935, and was made Baron Masham, of Ellington in the County of York, at the same time he was given the earldom. Born Philip Lloyd-Greame, he was the husband of Mary Constance "Molly" Boynton, granddaughter of Samuel Cunliffe-Lister, 1st Baron Masham. When his wife inherited the large Masham estates in 1924, they assumed the surname of Cunliffe-Lister in lieu of Lloyd-Greame.