William Craig may refer to:

• Bill Craig (writer) (1930–2002), Scottish television scriptwriter
• Billy Craig (1929–2011), Scottish footballer
• Will Craig (born 1994), American baseball player
• William Craig (author) (1929–1997), American author
• William Craig (botanist) (1832–1922), Scottish botanist and surgeon
• William Craig (broadcaster), Canadian broadcaster
• William Craig (businessman) (1903–1972), Scottish businessman
• William Craig (frontiersman) (1807–1869), American frontiersman and trapper
• William Craig (philosopher) (1918–2016), professor of philosophy at the University of California, Berkeley
• William Craig (Canadian politician) (1828–1897), Ontario political figure
• William Craig (Northern Ireland politician) (1924–2011), Northern Ireland politician
• William Craig (priest) (1873–1957), Dean of Ontario
• William Craig (Secret Service) (1855–1902), United States Secret Service member
• William Craig (swimmer) (1945–2017), American swimmer
• William Craig, Lord Craig (1745–1813), Scottish judge
• William Benjamin Craig (1877–1925), U.S. Representative from Alabama
• William Benson Craig (1896–1918), Canadian flying ace during World War I
• William Grindley Craig (1818–1886), British locomotive engineer
• William James Craig (1843–1906), first editor of the Oxford Shakespeare
• William Lane Craig (born 1949), American philosopher and theologian
• William Marshall Craig (died 1827), British painter
• William Young Craig (1827–1924), British Member of Parliament for North Staffordshire, 1880–1885
• William Gibson-Craig (1797–1878), Scottish politician
• Willie Craig, Scottish footballer who played for Celtic FC in the 1956 Scottish Cup Final