William Fischer

William Fischer may refer to:
 * Bill Fischer (Australian footballer) (1883–1917), Australian rules footballer and soldier
 * Bill Fischer (American football) (1927–2017), American football player
 * Bill Fischer (baseball) (1930–2018), former American Major League Baseball pitcher
 * William Fischer (baseball) (1891–1945), catcher in Major League Baseball
 * William S. Fischer, American composer, conductor, arranger, and producer