John Underwood may refer to:
John Underwood (actor) (fl. 1600–1624), English actor John Underwood (PR adviser), former Director of Communications for British Labour Party John William Henderson Underwood (1816–1888), U.S. Representative from Georgia John C. Underwood (1840–1913), American civil engineer, Lieutenant Governor of Kentucky from 1875 to 1879 John Curtiss Underwood (1809–1873), American lawyer, Abolitionist politician, and federal judge John Thomas Underwood (1857–1937), American entrepreneur and investor who founded the Underwood Typewriter Company John Underwood (American football) (1901–1932), played for the Milwaukee Badgers in the 1920s John W. Underwood, American aviation writer, photographer and historian. John Underwood (sportswriter) (1934–2023), American sportswriter and author