The Earl of Radnor is a title in the peerage of the United Kingdom, created in 1641. It is associated with the historic county of Wilts and has been held by various noble families over the centuries. The title is part of the British aristocracy and is often linked to significant contributions to politics and society. The current holder of the title is the Earl of Radnor, who is a member of the House of Lords. The title has a rich history, with several notable earls involved in public service and cultural patronage. The family seat is Longford Castle, located in Salisbury.