John Thomson may refer to:
John Thomson (died 1597) (1521–1597), MP for New Windsor and Bedfordshire
John Charles Thomson (1866–1934), New Zealand politician
John Thomson (Ohio politician) (1780–1852), US Congressman from Ohio
John Thomson (Australian politician) (1862–1934), Nationalist member of the House of Representatives
John Thomson (Western Australian politician), Nationalist Member of the Western Australian Legislative Assembly, 1921–1924
John Renshaw Thomson (1800–1862), US Senator from New Jersey
John William Thomson (born 1928), member of the Canadian Parliament
Jock Thomson (John Ross Thomson, 1906–1979), Scottish football player (Dundee FC, Everton FC) and manager (Manchester City FC)
John Thomson (baseball) (born 1973), American baseball player
John Thomson (footballer, born 1896) (1896–1980), Scottish football goalkeeper (Brentford FC, Plymouth Argyle)
John Thomson (footballer, born 1909) (1909–1931), Scottish football goalkeeper (Celtic FC, Scotland)
John Thomson (swimmer) (born 1903), British freestyle swimmer who competed in the 1924 Summer Olympics
Johnny Thomson (1922–1960), American race car driver
John Thomson (bowls), Welsh international lawn bowls player
John Thomson, minister in Sutherland, Scotland who was responsible for recording the works of the poet Rob Donn
John Thomson (Presbyterian minister) (1690–1753), Irish-born Presbyterian minister in Philadelphia
John Thomson (bishop) (born 1959), Church of England Bishop of Selby
John Edgar Thomson (1808–1874), American civil engineer, railroad executive and industrialist
John Turnbull Thomson (1821–1884), English civil engineer
John Thomson (RAF officer) (1941–1994), one of the senior officers of the Royal Air Force, later Commander-in-Chief Strike Command
John Thomson (died 1998), Deputy Steward of Oxford University and Lord Lieutenant of Oxfordshire
John Thomson (composer) (1805–1841), Scottish composer
John J. Thomson, production sound mixer
J. Arthur Thomson (1861–1933), Scottish naturalist
John Edgar Thomson (1808–1874), American civil engineer, railroad executive and industrialist
John Thomson (banker) (1908–1998), British banker
John Thomson (painter) (1778–1840), Scottish minister and landscape artist
John Thomson (comedian) (born 1969), English comedian and actor
John Thomson (diplomat) (born 1927), British high commissioner to India and ambassador to the UN
John Thomson (fraudster), warehouse keeper of the Charitable Corporation
John Thomson (photographer) (1837–1921), Scottish photographer
John Thomson (physician) (1765–1846), Scottish surgeon and physician,
John Thomson (cartographer) (1777–1840), Scottish cartographer
John Stuart Thomson (1869–1950), American author
John Bell Thomson (1835–1896), New Zealand police officer and detective
John Millar Thomson (1849–1933), British chemist
John Sen Inches Thomson (1845–1933), Scottish whaler and sealer, ship owner, captain and author