Thomas Rees may refer to:

• Thomas Rees (Congregational minister) (1815–1885), Welsh Congregationalist minister
• Thomas Rees (theologian) [cy] (1869–1926), Welsh theologian and editor, principal of Bala-Bangor Independent College, see 1926 in Wales
• Thomas Rees (Unitarian) (1777–1864), Welsh Unitarian minister and scholar

• Tom Rees (rugby union, born 1913) (1913–1991), Welsh international rugby union prop
• Tom Rees (rugby union, born 1984), rugby union footballer of the 2000 and 2010s for England, and London Wasps
• Tommy Rees (rugby) (1904–1968), rugby union and rugby league footballer of the 1920s and 1930s
• Tommy Rees (American football) (born 1992), American football quarterback

• Tom Rees (aviator) (1895–1916), first man killed by the "Red Baron"
• Thomas Wynford Rees (1898–1959), British Indian Army general

• T. Ifor Rees (Thomas Ifor Rees, 1890–1977), Welsh diplomat and translator
• Thomas M. Rees (1925–2003), U.S. Representative from California
• Thomas Rees (Twm Carnabwth) (1806–1876), Welsh leader of the Rebecca Riots, also known as Twm Carnabwth
• Tom Rees, physician and co-founder of AMREF
• Tom Rees (evangelist) (1911–1970), English evangelist
• Thomas ap Rees (1930–1996), botanist
• Thomas Rees (mayor) (1844–1921), master builder and mayor of Brisbane, Queensland, Australia

• Thomas J. Reese (born 1945), Jesuit author
• Tommy Reis (1914–2009), American baseball player