Earl of Radnor, of the County of Radnor, is a title which has been created twice. It was first created in the Peerage of England in 1679 for John Robartes, 2nd Baron Robartes, a notable political figure of the reign of Charles II. The earldom was created for a second time in the Peerage of Great Britain in 1765 for William Bouverie, 2nd Viscount Folkestone.