David or Dave Williams may refer to:
Musicians
- David Williams (guitarist) (1950–2009), American session guitarist
- Dave Williams (singer) (1972–2002), American rock singer
- David Williams (Australian indigenous musician) (born 1983), Aboriginal musician and artist
- David "Happy" Williams, Trinidadian jazz double-bassist
- David Williams (Australian musician), member of Augie March
- David Williams (born 1986), Welsh bassist with The Dear & Departed
- David Williams (born 1986), Welsh guitarist and bassist in Son of Dork
Politicians
- Dave Williams (Colorado politician), a state representative from Colorado Springs
- David Williams (died 1613), MP for Brecon
- David Williams (trade unionist) (born 1926), Welsh trade unionist
- Delwyn Williams (David John Delwyn Williams, born 1938), British Conservative politician, MP 1979–1983
- David L. Williams (politician) (born 1953), Kentucky judge, former President of the Kentucky Senate and 2011 gubernatorial nominee
- David Rogerson Williams (1776–1830), Governor of South Carolina, 1814–1816
- David Williams (philosopher) (1738–1816), ordained minister, theologian and political polemicist, founder in 1788 of the Royal Literary Fund
- David Williams (Swansea East MP) (1865–1941), Labour Member of Parliament for Swansea East, 1922–1940
- David Williams (Merioneth) (1799–1869), Member of Parliament for Merioneth, 1868–1870
- David Williams (Australian politician) (born 1941), former Australian politician
- D. J. Williams (politician) (David James Williams, 1897–1972), British miner and checkweighman who became a Labour Party Member of Parliament
- David Williams-Thomas, High Sheriff of the West Midlands
- David Williams (London politician) from Federal Executive
- David C. Williams (politician), member of the California legislature
Sportspeople
- Dave Williams (1900s pitcher) (1881–1918), Major League Baseball pitcher during part of the 1902 season
- David Williams (rugby union) (born ca. 1894), rugby union player who represented Australia
- Dave Williams (Welsh footballer) (1942–2015), Welsh football (soccer) coach and player for Newport County
- Dave Williams (wide receiver) (born 1945), former NFL player
- Dave Williams (running back) (born 1954), former professional American football player
- David Tiger Williams (born 1954), Canadian ice hockey player
- David Williams (footballer, born 1955), Welsh football (soccer) coach and former player for Bristol Rovers
- David Williams (Australian rules footballer) (born 1961), former Australian rules footballer
- David Williams (wide receiver) (born 1963), record-setting American football player at the University of Illinois
- David Williams (cricketer) (born 1963), West Indian cricketer
- David Williams (judoka) (born 1965), American judoka
- David Williams (offensive lineman) (born 1966), American football offensive lineman
- David Williams (ice hockey) (born 1967), American ice hockey player
- David Williams (footballer, born 1968), English football goalkeeper
- David Williams (born 1972), wrestler better known by the ring name David Young (wrestler)
- Dave Williams (rugby league born c. 1975), rugby league footballer of the 1990s for Wales
- Dave Williams (2000s pitcher) (born 1979), pitcher in Major League Baseball
- David Williams (card game player) (born 1980), American poker and Magic: the Gathering player
- David Williams (rugby league) (born 1986), Australian rugby league player
- David Williams (footballer, born 1988), Australian football (soccer) player
- D. J. Williams (tight end) (born 1988), player of American football from Arkansas
- David Williams (American cyclist) (born 1988), American cyclist
- David Williams (Canadian cyclist) (born 1994), Canadian cyclist
- Dave Williams (rugby league) (born 1989), rugby league footballer for Harlequins RL
- David Williams (American football running back) from Dallas Cowboys draft history
- David Williams (racing driver) from 1982 British Formula One season
- David Williams (scout) from 2013 Chicago Bears season
- David Williams (tennis) from 1929 Wimbledon Championships – Men's Singles
- David Williams (sailor), see Sailing at the 2000 Summer Paralympics
- David Williams (golfer) from Atlantic Open
- David Williams (cricketer, born 1948) from Douglas Harrop
- David Williams (darts player) in 2011 PDC Under-21 World Championship
- David Williams (defensive back) from Atlanta Falcons draft history
Theologians
- David Williams (1709–1784), Independent minister and schoolmaster
- David Williams (philosopher) (1738–1816), deist philosopher of the Enlightenment
- David Williams (geologist) (1792–1850), English geologist and priest
- David Williams (Archdeacon of Cardigan died 1929) (1841–1929), Archdeacon of Cardigan, 1903–1928
- David Williams (archbishop of Huron) (1853–1931), Anglican Bishop of Huron and later Metropolitan of Ontario in the 20th century
- David Williams (Archdeacon of Cardigan died 1936) (1862–1936), Archdeacon of Cardigan, 1928–1936
- David Williams (Methodist minister) (1877–1927), Welsh theologian and minister
- David Rhys Williams (1890–1970), American Unitarian minister
- David Williams (bishop of Basingstoke) (born 1961), Anglican bishop suffragan in the Church of England Diocese of Winchester
Architects
- David L. Williams (architect) (1866–1937), of Oregon
- David Williams (Alaska architect), architect and community planner
Writers, scientists and academics
- David John Williams (1885–1970), Welsh-language writer and Welsh nationalist
- David Marshall Williams (1900–1975), inventor
- David Gwyn Williams (1904–1990), Welsh poet, novelist, translator and academic
- Sir David Innes Williams (1919–2013), British paediatric urologist
- David J. Williams (born 1971), American science fiction writer and video game writer
- David Williams (journalist), Australian author and journalist
- David Williams (mathematician), probabilist
- David B. Williams (academic), dean of the College of Engineering at the Ohio State University
- David R. Williams (professor) (born 1954), Harvard T.H. Chan School of Public Health professor
- David Vernon Williams, New Zealand professor of law
- David Williams (historian) (1900–1978), Welsh historian
- David Glyndwr Tudor Williams (1930–2009), Vice-Chancellor of the University of Cambridge, 1989–1996
- David Williams (crime writer) (1926–2003), advertising executive and crime writer
- David Williams (author), Washington State Book Award
- David Williams (academic) (1786–1860), Vice-Chancellor of Oxford University, 1856–1858
- David Williams (screenwriter), British television screenwriter
- David Williams (medievalist) (1939–2015), professor and author
- David Williams (astronomer) from Royal Astronomical Society
- David Williams (geologist) (1792–1850), English geologist and priest
- David Williams (geologist born 1898) from Howel Williams
Artists
- David B. Williams (artist) (1947–2009), Ojibway aboriginal painter and printmaker from Canada
- David E. Williams (1933–1985), Kiowa-Tonkawa-Kiowa Apache painter from Oklahoma
- David A. Williams (comic artist), American comic book illustrator, animation artist and artist of Piranha Press
Military
- David Russell Williams (colonel) (born 1963), Canadian Forces pilot and former base commander
- David Williams (soldier) (1754–1831), one of the captors of British spy John Andre in the American Revolutionary War
- David Williams (Royal Navy officer) (1921–2012), British Royal Navy admiral, Second Sea Lord, 1974–1977
Filmmakers
- David Williams (producer), director and producer for ADV Films
- David C. Williams (film composer), American film composer
- David L. Williams (film director), British filmmaker
- David Williams (film distributor) from Raymond Longford Award
Space
- David Williams (space administrator) (born 1951), Director General of the British National Space Centre
- Dafydd Williams (born 1954), Canadian astronaut
Businessmen
- David K Williams (born 1958), American businessman
- David Williams (industrialist) (born 1969), British entrepreneur and founder of Avanti Communications Group plc
- David Williams (coal owner) (1809–1863), industrialist
- David Channing Williams (born 1947), British businessman
Judges
- David Williams (judge) from Justice of the King's Bench
- David W. Williams (1910–2000), American federal judge
Others
- Dave Williams (radio announcer) (born 1971), Australian radio host
- Dave Williams (Desperate Housewives), a fictional character on the TV series Desperate Housewives
- David Williams, character in Another Man, Another Chance
- David A. Williams, President and CEO of the Make-A-Wish Foundation
- David C. Williams (Inspector General), American inspector general
- David Hiram Williams (1812–1848), Welsh geological surveyor
- David Williams, the head of Shock Records
- David Williams (New College) from Edmund Hobhouse
- David Williams (Tioga County, NY) in 50th New York State Legislature
- David Williams (game designer) from MidSouthCon