John Montagu, 4th Earl of Sandwich, PC, FRS (13 November 1718 – 30 April 1792) was a British statesman who succeeded his grandfather Edward Montagu, 3rd Earl of Sandwich as the Earl of Sandwich in 1729, at the age of ten. During his life, he held various military and political offices, including Postmaster General, First Lord of the Admiralty, and Secretary of State for the Northern Department, but is perhaps best known for the claim that he was the eponymous inventor of the sandwich.
John Montagu was born in 1718, the son of Edward Montagu, Viscount Hinchingbrooke. His father died when John was four, leaving him as his heir. His mother soon remarried and he had little further contact with her. He succeeded his grandfather as Earl of Sandwich in 1729. He was educated at Eton and at Trinity College, Cambridge, and spent some time travelling, initially going on the Grand Tour round Continental Europe before visiting the more unusual destinations of Greece, Turkey, and Egypt which were then part of the Ottoman Empire. This led him to later found a number of Orientalist societies. On his return to England in 1739, he took his seat in the House of Lords as a follower of the Duke of Bedford, one of the wealthiest and most powerful politicians of the era. He became a Patriot Whig and one of the sharpest critics of the Walpole government, attacking the government's strategy in the War of the Austrian Succession. Like many Patriot Whigs, Lord Sandwich was opposed to Britain's support of Hanover and strongly opposed the deployment of British troops on the European Continent to protect it, instead arguing that Britain should make greater use of its naval power. He gained attention for his speeches in parliament. His oratory earned him a reputation for clearly setting out his argument even if he lacked natural eloquence.