William or Bill Mayer may refer to:

• Bill Mayer (born 1951), American illustrator
• William Mayer (composer) (1925–2017), American composer
• William A. Mayer (f. 1956–1959), American polo player
• William Daniel Mayer (born 1941), former member of the Maryland House of Delegates
• William E. Mayer, investment banker and former owner of the Hartford Colonials
• William V. Mayer (1920–1989), American biologist and educator

• William Meyer (disambiguation)
• William Moyer (1933–2002), author and organizer in the 1966 Chicago Freedom Movement

Topics referred to by the same term

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