David or Dave Williams may refer to:

• David Williams (Australian architect) (1856–1940), South Australian architect
• David L. Williams (architect) (1866–1937), American architect
• David Williams (Alaska architect) (fl. 1930s), architect and community planner in Alaska

• David Dougal Williams (1888–1944), British artist and art teacher
• David E. Williams (1933–1985), American Kiowa-Tonkawa-Kiowa Apache painter from Oklahoma
• David B. Williams (artist) (1947–2009), Canadian Ojibway aboriginal painter and printmaker

• David Williams (screenwriter), British television screenwriter
• David Williams, Australian film distributor, 1984 winner of the Raymond Longford Award
• David Walliams (David Edward Williams, born 1971), British comedian and author, especially of children books
• Dave Williams (radio announcer) (born 1971), Australian radio host
• David Williams (producer), American film director and producer for ADV Films
• David L. Williams (film director), British film director

• David Williams (died 1613), English Justice of the King's Bench, 1604–1613
• David W. Williams (1910–2000), American federal judge
• Sir David Williams (British legal scholar) (1930–2009), Vice-Chancellor of the University of Cambridge, 1989–1996
• Sir David Williams (arbitrator) (born 1941), New Zealand lawyer, jurist, and international arbitrator
• David C. Williams (inspector general) (born 1947), Inspector General of the U.S. Postal Service
• David Williams (New Zealand legal scholar)

• David Williams (pirate) (fl. 1698–1708), Welsh pirate active near Madagascar
• David Williams (soldier) (1754–1831), one of the captors of British spy John Andre in the American Revolutionary War
• Sir David Williams (Royal Navy officer) (1921–2012), British Royal Navy admiral, Second Sea Lord, 1974–1977

• Dave "Fat Man" Williams (1920–1982), New Orleans jazz, blues, and rhythm and blues pianist
• David "Happy" Williams (born 1946), Trinidadian jazz double-bassist
• 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 Williams (born 1986), Welsh guitarist in Son of Dork
• David Williams (born 1986), musician formerly with The Dear & Departed
• David Williams, Australian musician with Augie March
• David Williams, head of Shock Records
• David C. Williams (film composer), American film composer

• David Williams (died 1613), English MP for Brecon
• David Rogerson Williams (1776–1830), governor of South Carolina, 1814–1816
• David Williams (Liberal politician) (1799–1869), British Member of Parliament for Merioneth, 1868–1870
• David Williams (Swansea East MP) (1865–1941), British Labour Member of Parliament for Swansea East, 1922–1940
• David G. Williams (died 1903), member of the Wisconsin legislature
• David C. Williams (politician), member of the California legislature
• D. J. Williams (politician) (David James Williams, 1897–1972), British miner and checkweighman who became a Labour Party Member of Parliament
• David B. Williams (politician) (1919–1994), American jurist and politician, member of the Massachusetts House of Representatives
• David Williams (trade unionist) (born 1926), Welsh trade unionist
• Delwyn Williams (David John Delwyn Williams, born 1938), British Conservative politician, MP for Montgomeryshire, 1979–1983
• Sir David Williams (Richmond upon Thames politician) (born 1939), Leader of Richmond upon Thames Council, 1983–2001
• David Williams (Australian politician) (born 1941), Australian politician
• David L. Williams (politician) (born 1953), Kentucky judge, president of the Kentucky Senate and 2011 gubernatorial nominee
• Dave Williams (Colorado politician), member of the Colorado House of Representatives
• Dave Williams (Iowa politician), member of the Iowa House of Representatives
• David Williams (civil servant) (born 1968), British civil servant
• David Williams (Stoke-on-Trent North MP), British Labour Member of Parliament for Stoke-on-Trent North from 2024
• David Williams (Canadian politician), member of the Legislative Assembly of British Columbia from 2024

• David Williams (minister, born 1709) (1709–1784), Welsh independent minister and schoolmaster
• David Williams (philosopher) (1738–1816), Welsh minister, theologian and political polemicist
• David Williams (Oxford academic) (1786–1860), Vice-Chancellor of Oxford University, 1856–1858
• David Archard Williams (fl. 1865–1879), Welsh Anglican priest
• David Williams (priest, born 1841) (1841–1929), Archdeacon of Cardigan, 1903–1928
• David Williams (archdeacon of St David's) (1847–1920), Welsh Anglican priest
• David Williams (archbishop of Huron) (1853–1931), Welsh-born Anglican Bishop of Huron and later Metropolitan of Ontario
• David Williams (priest, born 1862) (1862–1936), Archdeacon of Cardigan, 1928–1936
• David Williams (Methodist minister, born 1877) (1877–1927), Welsh theologian and minister
• David Rhys Williams (1890–1970), American Unitarian minister
• David Williams (bishop of Basingstoke) (born 1961), Anglican Bishop of Basingstoke

• David Williams (geologist, born 1792) (1792–1850), English geologist and priest
• David Williams (geologist, born 1898) (1898–1984), British professor of geology
• David Hiram Williams (1812–1848), Welsh geological surveyor

• David Innes Williams (1919–2013), British paediatric urologist
• David Williams (Canadian physician), Canadian physician, Ontario's Chief Medical Officer of Health
• David R. Williams (scientist) (born 1954), American professor of sociology and public health

• Dafydd Williams (born 1954), Canadian astronaut
• David Williams (astrochemist) (born 1937), British astrochemist
• David Williams (space administrator) (born 1951), Chief Executive of the UK Space Agency

• David Williams (archaeologist) (1949–2017), British archaeologist
• David Williams, co-founder of the journal Biomaterials
• David B. Williams (materials scientist), British materials scientist, former dean of the College of Engineering at Ohio State University
• David Williams (mathematician), Welsh mathematician in probability theory

• Dai Williams (footballer) (fl. 1912–1921), also known as Dave Williams, English footballer
• David Williams (footballer, born 1931) (1931–2012), English footballer
• Dave Williams (footballer, born 1942) (1942–2015), Welsh football coach and player for Newport County
• David Williams (footballer, born 1955), Welsh football coach and player for Bristol Rovers
• David Williams (footballer, born 1968), English football goalkeeper
• David Williams (Australian soccer) (born 1988), Australian soccer player

• Dave Williams (wide receiver) (1945–2024), American football player
• Dave Williams (running back) (born 1954), American football player
• David Williams, American football player, see Atlanta Falcons draft history
• David Williams (wide receiver) (born 1963), American football player at the University of Illinois
• David Williams (offensive lineman) (born 1966), American football offensive lineman
• D. J. Williams (tight end) (born 1988), American football tight end
• David Williams (running back) (born 1994), American football running back

• David Williams (Australian rules footballer) (born 1961), former Australian rules footballer

• Dave Williams (1900s pitcher) (1881–1918), American baseball pitcher
• David Williams (2000s pitcher) (born 1979), American baseball pitcher

• David Williams (cricketer, born 1948), English cricketer
• David Williams (cricketer, born 1963), West Indian cricketer

• Dave Williams (rugby league, born 1967), rugby league footballer of the 1990s for Wales, Welsh Students, and South Wales Dragons
• David Williams (rugby league, born 1986), Australian rugby league player
• Dave Williams (rugby league, born 1989), rugby league footballer for Harlequins RL

• David Williams (rugby union, born 1894) (1894–1959), Australian rugby union player
• Dai Williams (rugby union) (1913–1975), South African rugby union player
• David Williams (rugby union, born 1995), English rugby union player

• David Williams, tennis player; see 1929 Wimbledon Championships – Men's Singles
• Dave Williams (basketball) (1913–1983), American basketball player
• Dave Williams (golf coach) (1918–1998), American college golf coach
• Tiger Williams (David Williams, born 1954), Canadian ice hockey player
• David Williams (judoka) (born 1965), American judoka
• David Williams (sailor) (born 1966), British Olympic sailor
• David Williams (ice hockey) (born 1967), American ice hockey player
• David Williams (born 1972) American wrestler better known by the ring name David Young
• David Williams (card game player) (born 1980), American poker player
• David Williams (American cyclist) (born 1988), American cyclist
• David Williams (Canadian cyclist) (born 1994), Canadian cyclist
• David Williams, darts player; see 2011 PDC Under-21 World Championship
• David Williams, golfer; see Atlantic Open
• David Williams, racing driver; see 1982 British Formula One season

• David John Williams (1885–1970), Welsh-language writer and Welsh nationalist
• David Williams (historian) (1900–1978), Welsh historian
• Gwyn Williams (writer) (David Gwyn Williams, 1904–1990), Welsh poet, novelist, translator and academic
• David Williams (crime writer) (1926–2003), British advertising executive and crime writer
• David Williams (medievalist) (1939–2015), Canadian medieval literature scholar
• David J. Williams (born 1971), American science fiction writer and video game writer
• David Williams (journalist), Australian author and journalist
• David Williams (natural history writer), American natural history writer

• David Williams (businessman, born 1969), British entrepreneur and founder of Avanti Communications Group plc
• David Williams (coal owner) (1809–1863), Welsh industrialist
• David A. Williams, American president and CEO of the Make-A-Wish Foundation
• David Henry Williams (1819–1897), American railroad surveyor, civil engineer and writer
• David Marshall Williams (1900–1975), American inventor
• Russell Williams (criminal) (David Russell Williams, born 1963), Canadian convicted murderer, rapist, and officer in the Canadian Forces

• Dave Williams (Desperate Housewives), a fictional character on the TV series Desperate Housewives
• David Williams, character in Another Man, Another Chance

• Davey Williams (disambiguation)
• David William (1926–2010), British/Canadian actor and director