Methuen is a surname. Notable people with the surname include:
Sir Algernon Methuen (1856–1924), founder of Methuen & Co. Ltd. Anthony Methuen, 5th Baron Methuen (1891–1975), British soldier, architect and peer Charlotte Methuen (born 1964), British Anglican priest and historian John Methuen (disambiguation) Paul Methuen (disambiguation), various British people, including politicians and scientists