John Nixon is the name of:
Politicians John Nixon (MP), member of the Long Parliament in England, representing Oxford City 1646–1648 John T. Nixon (1820–1889), U.S. Representative from New Jersey John William Nixon (1880–1949), Unionist politician in Northern Ireland
Military figures John Nixon (Continental Army general) (1727–1815), Continental Army general from Massachusetts during the American Revolution John Nixon (financier) (1733–1808), Philadelphia merchant and militia officer during the American Revolution John Nixon (Indian Army officer) (1857–1921), lieutenant general in the British Indian Army
Others John Nixon, Armagh, Irish Republican, see 1981 Irish hunger strike#1980 hunger strike John Nixon, Australian artist, director of Institute of Modern Art 1980–82 John Nixon (mining engineer) (1815–1899), English mining engineer John B. Nixon (1928–2005), murderer in Mississippi, USA John E. Nixon, director of Michigan state Budget office John Colley Nixon (died 1818), English merchant and amateur artist John Trice Nixon (1933–2019), U.S. federal judge John Nixon (planter), planter in Jamaica