William Davis may refer to:

• William C. Davis (historian) (born 1946), American historian and university professor
• William H. Davis (educator) (1848–1938), American educator and school administrator
• William Hatcher Davis (1939–2017), professor of philosophy, Auburn University
• William Stearns Davis (1877–1930), American educator, historian, and writer
• William Watson Davis (1884–1960), professor and author

• William B. Davis (born 1938), actor, professor, and waterskier
• Will S. Davis (1882–1920), American film director
• William Stanford Davis (born 1951), American actor
• Wee Willie Davis (1906–1981), American film actor
• Bill C. Davis (1952–2021), American playwright and actor
• Robert Hartford-Davis (1923–1977), born William Henry Davis, British producer, director and writer

• Bill Davis (musician), American guitarist, vocalist, and songwriter
• Wild Bill Davis (1918–1995), American jazz musician
• William "Bill" Davis, baritone, founding member of the 1950s R&B group The Crows
• Will Davis (musician) (1926–1984), jazz pianist

• William Davis (journalist) (1933–2019), economics editor, BBC presenter, editor of Punch, 1969–1977
• William Davis (artist) (1812–1873), Irish Pre-Raphaelite artist
• William Davis (photographer), American photographer
• William Moore Davis (1829–1920), American painter
• William Virgil Davis (born 1940), American poet
• Bill Davis (artist) (born 1949), American illustrator, animation director and designer, graphic designer, and painter

• William A. Davis Jr. (1927–2017), engineer for the United States Army
• William Church Davis (1866–1958), U.S. Army general
• William G. M. Davis (1812–1898), Confederate States Army general
• William V. Davis (1902–1981), United States Navy admiral
• William Davis (Royal Navy officer) (1901–1987), British admiral

• Bill Davis (1929–2021), Canadian politician, premier of Ontario
• Will Davis (Illinois politician) (born 1968), Illinois State Representative for the 30th district
• Will Davis (Virginia politician), Virginia state legislator for the 39th district
• William B. Davis (politician) (died 1935), American politician from Maryland
• William C. Davis (American politician) (1867–1934), 11th lieutenant governor of Alabama
• William C. Davis (Canadian politician) (born 1939), Canadian politician
• William E. Davis (1929–2021), former university president, Democratic politician and football coach
• William Hammatt Davis (1879–1964), American politician
• William Henry Davis (1872–1951), appointed assistant to the Secretary of War, 1917
• William H. Davis (sheriff), Pittsburgh City Council member, 1952–1954; Sheriff of Allegheny County, 1954–1970
• William H. Davis (Pennsylvania state representative), served 1854
• William H. Davis (Pennsylvania state senator) (1900–1955), served 1955
• William Lovel Davis (1844–1932), Australian politician
• William Morris Davis (congressman) (1815–1891), U.S. Representative from Pennsylvania
• William Walter Davis (1840–1923), Australian politician
• William Z. Davis (1839–1923), Republican politician in the U.S. State of Ohio and Ohio Supreme Court Judge
• William Howe Davis (1904–1982), American politician, mayor of Orange, New Jersey

• William Davis (cardiologist) (born 1957), American cardiologist and author of Wheat Belly
• William C. Davis Jr. (1921–2010), American ballistics engineer and writer
• William Conan Davis (1926–2022), African-American scientist
• William Morris Davis (1850–1934), American geographer, geologist and meteorologist
• William T. Davis (1862–1945), naturalist, entomologist and historian

• Bill Davis (offensive lineman) (1916–1994), American football tackle
• William C. Davis (American football) (1938–2020), American football coach
• Willie Davis (defensive end) (1934–2020), American football defensive end
• Willie Davis (wide receiver) (born 1967), American football wide receiver
• Will Davis (linebacker) (born 1986), American football defensive end
• Will Davis (cornerback) (born 1990), American football cornerback
• Bill Davis (coach) (1941–2002), American football coach

• William Davis (baseball), Negro league baseball player
• Willie Davis (baseball) (1940–2010), center fielder in Major League Baseball
• Will Davis (baseball) (born 1984), American college baseball coach
• Bill Davis (baseball) (1942–2023), baseball player
• Babe Davis (William L. Davis, fl.1937–1939), American baseball player

• Will Davis (basketball) (born 1992), American basketball
• Willie Davis (basketball) (born 1945), basketball player
• Bill Davis (basketball) (1921–1975), basketball player

• Will Davis (rugby union) (born 1990), English rugby union player
• Bill Davis (rugby union) (born 1942), New Zealand rugby union and softball player
• Wendy Davis (rugby union) (William Edward Norman Davis, 1913–2002), international rugby union player for Wales

• Bill Davis (darts player) (born 1959), American darts player
• Bill Davis (NASCAR owner), motorsports car owner
• J. William Davis, father of the National Letter of Intent for college athletics
• William Davis (cricketer, born 1880) (1880–1959), who played for Surrey, London County and the South of England from 1903 to 1911
• Will Davis (cricketer) (born 1996), English cricketer
• William Davis (golfer) (died 1902), Scottish golfer
• Bill Davis (ice hockey) (born 1954), Canadian ice hockey player

• William Davis (miner) (1887–1925), miner killed during strike protest leading to Davis Day
• William Heath Davis (1822–1909), early settler of San Diego, California, USA
• William John Davis (1848–1934), British trade unionist
• William Rhodes Davis (1889–1941), American oil man and Nazi collaborator
• William Davis (bishop) (1908–1987), Anglican bishop and archbishop in Canada
• William Davis (judge) (born 1954), judge of the High Court of England and Wales
• William Davis (priest), English priest
• William George Davis, American serial killer and former nurse

• Billy Newton-Davis (born 1951), Canadian R&B, jazz and gospel singer-songwriter
• Billy Davis (disambiguation)
• William Davies (disambiguation)