Wild Bill
Wild Bill may refer to:

Places
Wild Bill Lake, a lake in Montana

People
Wild Bill Hickok (1837–1876), folk hero of the American Old West
William L. Carlisle (1890–1964), train robber of the American West
Wild Bill Claiborne (1872–1933), American college football player
Bill Clinton, former United States president referred to by Donald Trump as "Wild Bill"
William Cutolo (1949–1999), New York mobster
Wild Bill Davis (1918–1995), jazz organist
Bill Davison (1906–1989), jazz cornet player
William Edward Donovan (1876–1923), American professional baseball pitcher and manager
William Joseph Donovan (1883–1959), American soldier, lawyer, and intelligence officer, founder of the precursor to the Central Intelligence Agency
William O. Douglas (1898–1980), Supreme Court Justice
Wild Bill Elliott (1904–1965), American actor who specialized in Western film roles
Bill Elliott (born 1955), 1988 NASCAR Winston Cup Series Champion and twice Daytona 500 winner
Wild Bill Gelbke (born 1938), American engineer and motorcycle designer
William Guarnere (1923–2014), American soldier in the 101st Airborne during World War II, made famous by the mini-series Band of Brothers
Wild Bill Hagy (1939–2007), American baseball fan who led cheers for the Baltimore Orioles
Bill Hallahan (1902–1981), American baseball pitcher
William Adams Wild Bill Hickman (1815–1883), frontiersman, ex-Mormon, and purported murderer
Bill Hickok (American football) (1874–1933), American football player and businessman
William Dathan Holbert (born 1979), American serial killer
William Hopson (died 1928), American pilot
Bill Hunter (ice hockey) (1920–2002), Canadian hockey player, general manager and coach
Wild Bill Irwin (born 1954), American professional wrestler
William Karlsson (born 1993), Swedish professional ice hockey player
William Kocay, Canadian professor and graph theorist
William Langer (1886–1959), governor and senator from North Dakota
Bill Longley (gunfighter) (1851–1878), outlaw of the old American West
Wild Bill Longson (1906–1982), American professional wrestler
Bill Lovett (c. 1894–1923), Irish-American gangster in New York
Wild Bill Luhrsen (1884–1973), American baseball pitcher
Wild Bill Moore (1918–1983), American R&B and jazz saxophone player
Wild Bill Shrewsberry (born 1938), American drag racer
Bill Stealey (born 1947), retired U.S. Air Force pilot and computer game producer
Wild Bill Widner (1867–1908), American baseball pitcher
Billy Wiles (born 1971), an American professional wrestler

Arts, entertainment, and media
Wild Bill (G.I. Joe), a fictional character in the G.I. Joe universe
Wild Bill (1995 film), about the legendary gunfighter
Wild Bill (2011 film), directorial debut of English actor Dexter Fletcher
Wild Bill (TV series), a 2019 ITV television series