Thomas or Tom Ellis may refer to:

• Thomas Ellis (15th-century MP), in 1421 Member of Parliament (MP) for Kent
• Thomas Ellis (1569–1627), MP for Great Grimsby
• Thomas Ellis (Irish politician) (1774–1832), U.K. Member of Parliament representing Dublin City, 1820–1826
• Thomas J. Ellis (born 1959), Pennsylvania attorney and politician
• Thomas Flower Ellis (1796–1861), law reporter
• T. E. Ellis (1859–1899), Welsh politician
• Thomas F. Ellis (1920–2018), American lawyer and political activist
• Tom Ellis (politician) (1924–2010), British Member of Parliament, 1970–1983
• Thomas Hobart Ellis (1894–1981), Governor of East Pakistan
• T. S. Ellis III (born 1940), American federal district judge

• Thomas Ellis (priest, died 1673) (1625–1673), Welsh clergyman
• Thomas Ellis (priest, died 1792) (1711/12–1792), Welsh clergyman

• Thomas Sayers Ellis, American poet and photographer
• Tom Ellis (actor) (born 1978), Welsh actor
• Thomas Ellis (Irish emigrant), in 1866 the first European settler in Penticton, British Columbia
• Tom Ellis (journalist) (1932–2019), radio and television news anchor
• Tommy Ellis (born 1947), NASCAR racing driver
• Thomas Iorwerth Ellis (1899–1970), Welsh classicist
• Tom Ellis (architect) (1911–1988), English architect
• Tom Ellis (rugby league) (1904–1995), Australian rugby league footballer
• Thomas Ellis (cattle baron), Canadian cattle baron
• Tom Ellis (rugby union) (born 1994), English rugby union player
• Thomas Ellis (Tuskegee Airman) (1920–2018) Tuskegee Airman
• Thomas Ellis (cricketer) (1828–?), English cricketer

• All pages with titles containing Thomas Ellis
• Thomas Ellys (1685–1709), MP