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

• Vilyam Genrikhovich Fisher (1903–1971), Soviet intelligence officer
• William J. Fischer Housing Development, New Orleans public-housing development
• Willy Fischler (born 1949), Belgian physicist
• William Fisher (disambiguation)

This disambiguation page lists articles about people with the same name.
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