William Sullivan may refer to:
Government William J. Sullivan (1939–2022), American judge on the Connecticut Supreme Court William H. Sullivan (1922–2013), United States diplomat William Sullivan (Kentucky politician) (1921–2013), Kentucky state senator William C. Sullivan (1912–1977), head of the Federal Bureau of Investigation's intelligence operations William T. Sullivan (1894–1968), Wisconsin state representative Sir Bill Sullivan (politician) (1891–1967), New Zealand minister of labour William P. Sullivan (1870–1925), Missouri state representative William Wilfred Sullivan (1839–1920), premier of Prince Edward Island William V. Sullivan (1857–1918), United States senator from Mississippi William F. Sullivan (born 1957), associate justice for the Massachusetts Superior Court William R. Sullivan (born 1945), member of the Iowa House of Representatives
Sports and related William Sullivan (cricketer) (1877–1924), Australian cricketer William Sullivan (field hockey) (1909–1981), Indian field hockey player Bill Sullivan (outfielder) (1853–1884), Irish baseball player Bill Sullivan (pitcher) (1868–1905), baseball player for the Syracuse Stars Billy Sullivan (businessman) (1915–1998), owner of the Boston Patriots, an original franchise of the American Football League Billy Sullivan (baseball, born 1875) (1875–1965), major league catcher Billy Sullivan Jr. (1910–1994), his son, baseball catcher William Sullivan (pitcher) (1864–1911), baseball player for the St. Louis Maroons Billy Sullivan (rugby league), Australian rugby league player and coach
Others William John Sullivan (born 1976), software freedom activist, hacker, and writer William Laurence Sullivan (1872–1935), Unitarian clergyman and author William L. Sullivan (author) (born 1953), American author William D. Sullivan (born 1950), United States Navy officer William Matheus Sullivan (1885–1947), American lawyer and art patron William Holmes Sullivan (1836–1908), British painter William N. Sullivan (1908–1979), American entomologist William Kirby Sullivan (1822–1890), Irish philologist Billy Sullivan (actor) (1891–1946), American character actor William "Rocky" Sullivan, character in Angels with Dirty Faces Bill Sullivan (artist) (1942–2010), American painter, printmaker and publisher
See also William O'Sullivan (disambiguation)