William, Willie, Will, Bill, or Billy Smith may refer to:
Academics
William Smith (Master of Clare College, Cambridge) (1556–1615), English academic
William Smith (antiquary) (c. 1653–1735), English antiquary and historian of University College, Oxford William Smith (scholar) (1711–1787), English classical scholar and Anglican Dean of Chester William Smith (Episcopal priest) (1727–1803), Scottish-born first provost of University of Pennsylvania William Pitt Smith (1760–1796), American physician, educator and theological writer William Andrew Smith (1802–1870), American college president and clergyman William Smith (lexicographer) (1813–1893), English editor and publisher of dictionaries William Robertson Smith (1846–1894), Scottish philologist, physicist, archaeologist and Biblical critic William Benjamin Smith (1850–1934), American professor of mathematics at Tulane University William Ramsay Smith (1859–1937), Australian anthropologist William George Smith (1866–1918), Scottish psychologist William Hall Smith (1866–after 1920), President of Mississippi Agricultural and Mechanical College, 1916–1920 William Cunningham Smith (1871–1943), American academic of English literature, university administrator and writer William Roy Smith (1876–1938), American academic historian William Charles Smith (1881–1972), English musicologist William Newton-Smith (1943–2023), Anglo-Canadian philosopher of science
Arts and entertainment
William "Gentleman" Smith (1730–1819), English stage star
William Henry Smith (1806–1872), American author of 1844 temperance play The Drunkard William Smith (actor) (1933–2021), American character performer William Smith (teacher) (born 1939), South African television science and mathematics presenter Will Smith (born 1968), American actor, rapper and film producer Will Smith (comedian) (born 1971), English actor and writer
Art and literature
William Smith (poet) (before 1570–after 1606), English sonneteer
William Thompson Russell Smith (1812–1896), Scottish-American painter
William Collingwood Smith (1815–1887), English painter
William Jardine Smith (1834–1884), Australian writer and editor
William Brooke Smith (before 1880–1908), American artist
William Twigg-Smith (1883–1950), New Zealand artist
William Hart-Smith (1911–1990), New Zealand/Australian poet
William E. Smith (artist) (1913–1997), African American illustrator
W. Eugene Smith (1918–1978), American photojournalist
William Craig Smith (1918–1986), American art director
William Arthur Smith (1918–1989), American artist
William Jay Smith (1918–2015), American poet
William Gardner Smith (1927–1974), African-American novelist
Bill Smith (jewelry designer) (born 1933), first African American recipient of Coty Award Willi Smith (1948–1987), American fashion designer Will Smith, American tech journalist, 2010 founder of Tested.com
Characters
Bill Smith (Red Green Show character), from Canadian comedy The Red Green Show, played by Rick Green Billy Smith (SNL), a recurring character on the live television variety show Saturday Night Live Billy Smith, a character in Coronation Street Will Smith (The Fresh Prince of Bel-Air), from American sitcom The Fresh Prince of Bel-Air, based on the real-life rapper Will Smith (Home and Away), from Australian soap opera Home and Away Will Smith, child character in Wee Sing The Best Christmas Ever!
Music
Barkin' Bill Smith (1928–2000), American Chicago blues singer
Bill Smith (Canadian musician) (born 1938), Canadian record producer, musician, writer, editor Bill Smith (jazz musician) (1926–2020), folk jazz clarinetist, professor of music at the University of Washington Major Bill Smith (1922–1994), American record producer and executive William Smith (composer) (1603–1645), English composer from the city of Durham William "Smitty" Smith (1944–1997), keyboardist and session musician Willie "Big Eyes" Smith (1936–2011), blues drummer and singer Willie Smith (alto saxophonist) (1910–1967), jazz alto saxophonist Willie "The Lion" Smith (1893–1973), jazz pianist William Oscar Smith, jazz double bassist and music educator
Business
William Henry Smith (1792–1865), entrepreneur whose business was about both newsagents and book shops William Henry Smith (1825–1891), son of the above, and politician William Smith (businessman) (1818–1912), nurseryman and donor to Hobart and William Smith Colleges William Reardon Smith (1856–1935), British shipowner Willie Reardon Smith (1887–1950), British shipowner William Wensley Smith (1887–1955), founder of W. W. Smith Insurance Ltd