John Sylvester may refer to:
John Sylvester (admiral) (1904–1990), United States Navy admiral John Sylvester (American football) (1923–2012), halfback who played in the All-America Football Conference John Sylvester (cricketer) (born 1969), Grenadian cricketer John N. Sylvester (1909–1993), American politician in the state of Washington John B. Sylvester, United States Army general Johnny Sylvester (1915–1990), American businessman associated with Babe Ruth John Sylvester, one of the pen names of British author Hector Hawton (1901–1975)
See also John Silvester (disambiguation)