David Walker or Dave Walker may refer to:

• David Walker (banker) (born 1939), British banker, ex-chairman of Morgan Stanley International
• David Walker, English/American brewer, co-founder of Firestone Walker Brewing Company in 1996
• David Davis Walker (1840–1918), American businessman

• David Walker (Catholic bishop) (born 1938), Australian Roman Catholic bishop since 1996
• David Walker (bishop of Manchester) (born 1957), Church of England bishop

• David Walker, American opera singer, winner of the 1998 Metropolitan Opera National Council Auditions
• David Walker, former singer with the American Gospel quartet the Kingdom Heirs
• David G. Walker (born 1946), British pianist, singer and composer
• David T. Walker (born 1941), American guitarist
• Dave Walker (born 1945), British musician, member of the band Fleetwood Mac
• Bunker Hill (musician) (1941–1986), stage name of American R&B and gospel singer born David Walker

• David Walker (Arkansas politician) (1806–1879), member of the Arkansas General Assembly and the Arkansas Supreme Court
• David Walker (Canadian politician) (born 1947), Canadian politician who served in the Canadian House of Commons
• David Walker (Kentucky politician) (1763–1820), United States Representative from Kentucky
• David Walker (West Virginia politician) (born 1952), member of the West Virginia House of Delegates
• David James Walker (1905–1995), Canadian politician
• David S. Walker (1815–1891), governor of Florida

• David M. Walker (U.S. Comptroller General) (born 1951), 7th Comptroller General of the United States
• David Marr Walker (1835–1920), Canadian lawyer, judge and political figure in Manitoba
• David Walker (diplomat), WTO trade representative from New Zealand

• David Walker (historian) (born 1945), Australian historian of the Australian - Asian engagement
• David A. Walker (scientist) (1928–2012), British professor of photosynthesis
• David Maxwell Walker (1920–2014), Scottish lawyer and academic
• David Grant Walker (1923–2017), British historian

• David Walker (American football coach) (born 1969), former college football star and assistant coach for the Chicago Bears
• David Walker (basketball) (born 1993), American basketball player
• David Walker (cricketer) (1913–1942), English cricketer
• David Walker (defensive end) (born 2000), American football player
• David Walker (quarterback) (born 1955), former American football quarterback for Texas A&M University
• David Walker (racing driver) (1941–2024), Australian racing driver
• David Walker (rower) (1932–2014), British Olympic rower
• David Walker (boxer) (born 1976), English boxer
• Dave Walker (footballer, born 1908), English footballer for Walsall and Brighton & Hove Albion
• Dave Walker (footballer, born 1941) (1941–2015), English footballer for Burnley and Southampton
• Dave Walker, Scottish former professional footballer, played for St. Mirren FC in the 1959 Scottish Cup Final
• Dave Walker (American football), American high school football coach
• David Walker (sprinter), winner of the 1983 NCAA Division I outdoor 4 × 400 meter relay championship

• Dave Walker (1955–2014), Canadian writer who died under mysterious circumstances; see Death of Dave Walker
• David Walker (abolitionist) (1796–1830), American black abolitionist
• David Walker (author) (1911–1992), Scottish-born Canadian writer
• David Walker (journalist) (born 1941), American television news anchor
• Sir David Walker (RAF administrative officer) (born 1956), Royal Air Force air marshal and Master of the Household to the Queen
• David Walker (RAF aircrew officer) (1956–2023), Royal Air Force air marshal
• David M. Walker (astronaut) (1944–2001), United States astronaut
• David Walker (EastEnders), fictional character on the BBC soap opera, EastEnders
• David Walker (born 1976), birth name of Angus Oblong, American author and illustrator
• David F. Walker, American comic book creator