William Riley

William, Bill, Billy, or Willie Riley may refer to:

Sports

 * William Riley (Nottinghamshire cricketer) (1888–1917)
 * William Riley (Leicestershire cricketer) (1892–1955)
 * Bill Riley (ice hockey, born 1921) (1921–2000), American ice hockey player
 * Bill Riley (ice hockey, born 1950), Canadian ice hockey player
 * Bill Riley Jr., American ice hockey player and coach
 * Billy Riley (1889–1977), wrestler
 * Billy Riley (baseball) (1855–1887), outfielder in Major League Baseball

Arts and entertainment

 * Willie Riley (1866–1961), British author
 * William K. Riley, one of the pen names of British author John Creasey (1908–1973)
 * Bill Riley Sr. (1920–2006), American entertainer
 * Billy Lee Riley (1933–2009), American musician

Other

 * William Riley (architect) (1852–1937), British architect
 * William J. Riley (born 1947), United States federal judge
 * William F. Riley (judge) (1884–1956), United States federal judge
 * William F. Riley (engineer), American engineer and professor
 * William Harrison Riley (1835–1907), British socialist
 * William Bell Riley (1861–1947), American religious leader
 * William Riley (criminal), a.k.a. "Mush" Riley, American saloon keeper and underworld figure
 * William E. Riley (1897–1970), American general