Viscount Monckton of Brenchley, of Brenchley in the County of Kent, is a hereditary title in the Peerage of the United Kingdom. It was created on 11 February 1957 for the lawyer, Conservative politician and former Minister of Defence, Sir Walter Monckton. His son, the second viscount, was a major-general in the British Army. As of 2018 the title is held by the latter's eldest son, the third viscount, who succeeded in 2006. He is a journalist known for his climate change skepticism, work for The Heartland Institute and as the creator of the Eternity puzzle.