Sir Henry Halford, 1st Baronet, GCH (2 October 1766 – 1844), born Henry Vaughan, was president of the Royal College of Physicians for 24 years. As the royal and society physician, he was physician extraordinary to King George III from 1793 to 1820, then as physician in ordinary to his three successors – George IV, William IV and the young Victoria. He also served other members of the royal family until his death.