John William Leonard Lyttelton, 11th Viscount Cobham (15 June 1943 – 13 July 2006) was a British nobleman and peer from the Lyttelton family. He was known as "Johnny Lyttelton" to his friends and family. He was educated at Eton, where his father had been before him, and at Christ's College, Christchurch while his father was Governor-General of New Zealand. He later attended the Royal Agricultural College in Cirencester. Lord Cobham remarried on 1 August 1997 to Lisa Clayton, the first British woman to have sailed single-handed and non-stop around the world.