Thomas Watson may refer to:

• Thomas Watson (bishop of Lincoln) (1515–1584), Catholic bishop
• Thomas Watson (bishop of St David's) (1637–1717), English clergyman

• Thomas Watson (poet) (c. 1557–1592), English poet and translator
• Thomas Watson (Puritan) (c. 1620–1686), nonconformist preacher and writer
• Tom Watson (journalist) (born 1962), journalist and author

• Tom Watson (football manager) (1859–1915), English football manager
• Tom Watson (footballer, born 1860s) (1868 or 1869 – 1902), English football goalkeeper for Small Heath
• Tom Watson (Australian footballer) (1874–1920), Australian rules footballer
• Thomas Watson (cricketer, born 1880) (1880–1944), English clergyman and cricketer
• Tom Watson (footballer, born 1900) (1900–1978), Ireland international football player
• Tom Watson (footballer, born 1904) (1904–1979), footballer for Rochdale
• Tommy Watson (boxer) (1908–1971), English boxer
• Thomas Watson (cricketer, born 1913) (1913–1994), English cricketer and educator
• Gordon Watson (footballer, born 1914) (Thomas Gordon Watson, 1914–2001), English footballer for Everton
• Tom Watson (golfer) (born 1949), American golfer
• Tommy Watson (footballer, born 1943), Scottish football winger
• Tommy Watson (footballer, born 1969), English football player
• Tom Watson (fighter) (born 1982), mixed martial artist
• Tom Watson (footballer, born 2006), footballer for Sunderland

• Thomas Watson (silk spinner) (1823–1887), British politician; MP for Ilkeston, Derbyshire, 1885–1887
• Thomas E. Watson (1856–1922), American politician; Populist leader; U.S. Senator from Georgia
• Thomas Philip Watson (1933–2015), American politician; Oklahoma State Senator
• Thomas R. Watson (born 1947), American politician; Maine state representative
• Thomas Watson, 3rd Earl of Rockingham (1715–1746), English nobleman and politician; MP for Canterbury
• Thomas Watson (Berwick-upon-Tweed MP) (c. 1701–1766), British politician; MP for Berwick-upon-Tweed, 1754–1765
• J. Thomas Watson (1885–1954), Attorney General of Florida
• Tom Watson, Baron Watson of Wyre Forest (born 1967), British politician; former Deputy Leader of the Labour Party; and former MP for West Bromwich East
• Thomas Watson (died before 1621) English Member of Parliament

• Thomas J. Watson (1874–1956), first president of IBM
• Thomas W. Watson, co-founder and former Vice Chairman of Omnicom Group, Inc.
• Thomas J. Watson Jr. (1914–1993), second president of IBM and son of Thomas J. Watson

• Thomas Watson (engraver) (1750–1781), fine engraver
• T. H. Watson (Thomas Henry Watson, 1839–1913), British architect
• Thomas Lennox Watson (1850–1920), Scottish architect and interior designer
• Tom Watson (actor) (1932–2001), Scottish-born stage, television and film actor
• Yannima Tommy Watson (c. 1935–2017), Australian artist

• Thomas A. Watson (1854–1934), inventor and assistant to Alexander Graham Bell, notably in the invention of the telephone
• Tom Watson (musician) (born 1962), American guitarist
• Thomas E. Watson (USMC) (1892–1966), U.S. Marine Corps general
• Thomas Watson (surveyor), early Western Australian surveyor
• Thomas Watson (trade unionist) (1860–1921), British trade union leader
• Thomas Colclough Watson (1867–1917), British recipient of the Victoria Cross
• Thomas Watson (physician) (1792–1882), British physician and president of the Royal College of Physicians, 1862–66
• Thomas Watson (Royal Navy officer) (died 1744), British navy captain