Thomas or Tom Barker may refer to:
Arts and entertainment Thomas Barker (painter) (1769–1847), British painter of landscape and rural life Thomas Jones Barker (1813–1882), English historical and portrait painter Tom Barker (designer) (born 1966), British designer and academic
Law and politics Thomas Barker (Australian politician) (1799–1875), Australian politician in New South Wales Thomas F. Barker (1828–1896), Canadian politician in New Brunswick Thomas William Barker (1861–1912), Welsh solicitor
Sports Thomas Barker (fishing guide) ( 1591–1651), British fishing guide Thomas Barker (cricketer, born 1798) (1798–1877), English cricketer Thomas Barker (cricketer, born 1812) (1812–1873), English cricketer Tom Barker (basketball) (born 1955), American basketball player Tom Barker (rugby union) (born 1956), Australian rugby union player
Others Thomas Barker (meteorologist) (1722–1809), English weather observer Thomas Barker (academic) (c. 1728–1785), principal of Brasenose College, Oxford Thomas Richard Barker (1799–1870), English Independent minister and college tutor Thomas Holliday Barker (1818–1889), English temperance advocate and vegetarian Thomas Barker (mathematician) (1838–1907), Scottish mathematician and professor of pure mathematics Thomas Henry Barker (1841–1917), secretary of the Liverpool Chamber of Commerce Tom Barker (trade unionist) (1887–1970), New Zealand tram conductor, trade unionist and socialist