John Gage was a partner at Kleiner Perkins and the former Vice President of the Science Office at Sun Microsystems.

John or Jack Gage may also refer to:

Politicians and landowners

• John B. Gage (1887–1970), mayor of Kansas City, Missouri, 1940–1946
• Sir John Gage (15th-century landowner) (died 1475)
• Sir John Gage (Tudor politician) (1479–1556), English Tudor politician
• John Gage (died 1598), MP for Lewes
• Sir John Gage, 1st Baronet (died 1633), English baronet and landowner
• Jack R. Gage (1899–1970), American politician

Others

• John Gage (Indecent Proposal), fictional character in the film Indecent Proposal
• Firefighter Paramedic John Gage, fictional character in the American television series Emergency!
• Jack Gage (director) (1912–1989), American film and television director
• John Gage (art historian) (1938–2012), British art historian

See also

• John Gage Rokewode (1786–1842), British historian and antiquarian
• John Gager (born 1937), professor of religion at Princeton University