Thomas Williams may refer to:

Academics Thomas Williams, Gresham Professor of Astronomy Thomas Desmond Williams (1921–1987), Irish academic and Professor of Modern History at University College Dublin Thomas R. Williams (1939–2025), Canadian educator, 19th principal of Queen's University T. Harry Williams (1909–1979), historian at Louisiana State University Thomas Williams, Assistant Dean, Sandra Day O'Connor College of Law T. C. Williams, American educator for whom T. C. Williams High School, Alexandria, Virginia, is named Thomas W. Williams (engineer), American educator and 1989 IEEE fellow Thomas Williams (philosopher), American philosopher

Arts Thomas Williams (cartoonist) (1940–2002), English cartoonist Thomas Williams (Christadelphian) (1847–1913), editor of the Christadelphian Advocate magazine Thomas Williams (writer) (1926–1990), American novelist Tennessee Williams (Thomas Lanier Williams, 1911–1983), American playwright Thomas Richard Williams (1825–1871), British photographer Ras Shiloh (born 1975), stage name for reggae artist Thomas Williams Thomas Chatterton Williams (born 1981), American writer

Military Thomas Williams (Australian Army officer) (1884–1950), Australian major general Thomas Williams (Union general) (1815–1862), Union general during the American Civil War Thomas Williams (Royal Navy officer) (1761/62-1841), British admiral Thomas Williams (RAF officer) (1899–1956), British air marshal Thomas F. Williams (1885–1985), Canadian First World War flying ace Thomas J. Williams (1837–1866), American Union general during the American Civil War

Religion Thomas Williams (priest and translator) (1658–1726), Welsh Anglican priest Thomas Williams (vicar apostolic of the Northern District) (1661–1740), Roman Catholic bishop Thomas Williams (Congregational minister) (1725–1770), Congregational minister Thomas Williams (1755–1839), author of the Cottage Bible Thomas Williams (1779–1876), Congregational minister Thomas Williams (Christadelphian) (1847–1913) Thomas Rhondda Williams (1860–1945), Welsh Congregational minister Thomas Charles Williams (1868–1927), Welsh Calvinistic Methodist minister Thomas Williams (dean of Bangor) (1870–1941), Welsh Anglican priest Thomas Leighton Williams (1877–1946), British Roman Catholic archbishop Thomas Williams (archdeacon of Craven) (1889–1956), Anglican priest Thomas Williams (cardinal) (1930–2023), Roman Catholic bishop Thomas Williams (dean of Llandaff) (died 1877), Welsh Anglican priest

Politicians Australia Thomas Williams (South Australian politician) (c. 1794–1881), politician in the colony of South Australia Thomas Williams (Australian politician) (1897–1992), Australian politician Thomas Williams (New South Wales politician) (1862–1953), Australian politician

United Kingdom Thomas Williams (by 1518-79/90), MP for Oxford Thomas Williams (speaker) (1513/4–1566), Speaker of the House of Commons Thomas Williams (Warrington MP) (1915–1986), British Labour Co-operative politician Thomas Williams of Llanidan (1737–1802), Welsh lawyer and businessman known as the “Copper King of Parys Mountain”, MP for Marlow 1790–1802 Thomas Williams, 1st Baron Williams (1892–1966), British life peer and Labour Party member Jeremiah Williams (British politician) (Thomas Jeremiah Williams, 1872–1919), Welsh barrister and Liberal politician Thomas Peers Williams (1795–1875), MP for Marlow 1820–1868, Father of the House, 1867–1868; grandson of Thomas Williams of Llanidan T. Russell Williams (1869–1926), socialist activist Thomas Williams (Kennington MP) (1877–1927), British Member of Parliament for Kennington, 1923–1924 Sir Thomas Williams, 1st Baronet (c. 1621–1712), English medical doctor and Member of Parliament for Weobley Thomas Williams of Edwinsford (died 1762), Custos Rotulorum of Carmarthenshire from 1745 to 1762

United States Thomas Williams (Alabama politician) (1825–1903), US representative Thomas Williams (Pennsylvania politician) (1806–1872), US representative Thomas Edward Williams (politician) (1849–1931), American politician in Wisconsin and Nebraska Thomas Hickman Williams (1801–1851), US senator from Mississippi, 1837–1838 Thomas Hill Williams (1780–1840), US senator from Mississippi, 1817–1828 Thomas Lanier Williams I (1786–1856), American lawyer who served as a justice of the Tennessee Supreme Court Thomas Marvin Williams (1890–1967), member of the Mississippi State Senate Thomas Scott Williams (1777–1861), US representative from Connecticut Thomas Sutler Williams (1872–1940), US representative from Illinois Thomas Wheeler Williams (1789–1874), US representative from Connecticut Thomas W. Williams (politician) (c. 1867–1931), church minister and member of the Los Angeles, California, City Council

Sport Thomas Williams (American football) (born 1984), American football player Thomas Williams (cricketer, born 1884) (1884–1954), Welsh cricketer Thomas Williams (Irish cricketer) (1908–1982), Irish cricketer Thomas Williams (figure skater) (born 1991), Canadian ice dancer Thomas Williams (rugby league), rugby league footballer of the 1910s for Wales, and Oldham Thomas Williams (soccer) (born 2004), American soccer player Thomas Williams Jr. (born 1987), American boxer

Others Thomas H. Williams (California official) (1828–1886), attorney general of California, 1858–1862 Thomas Lyle Williams (1896–1976), American businessman Thomas Williams (manufacturer) (1846–?), New Zealand ironfounder and businessman Thomas Williams (Mayflower), signatory of the Mayflower Compact Thomas Williams (pioneer) (died 1785), early settler to Detroit, Michigan and grandfather of general Thomas Williams Thomas Williams (died 1831), murderer, one of the London Burkers Thomas Walter Williams (1763–1833), English barrister, known as a legal writer Thomas Williams (Northern Rhodesian speaker) (1893–1967), Speaker of the Legislative Council of Northern Rhodesia Thomas Coldham Williams (1825–1912), New Zealand land owner Thomas Williams (Tehoragwanegen) (c.1758–1848), Iroquois chief of the Kahnawake peoples T. Marchant Williams, Welsh nationalist, lawyer, and author

See also Thomas Thangathurai William, Sri Lankan politician Tom Williams (disambiguation) Tomos Williams (born 1995), Welsh rugby union player