John Singer may refer to:
Seymour Jonathan Singer (1924–2017), cell biologist and author John Singer (homeschooler) (1931–1979), American killed in a standoff over homeschooling John Singer (actor, born 1923) (1923–1987), English actor John Singer (16th-century actor) (fl. 1594–1602?), English actor and dramatist John Webb Singer (1819–1904), British businessman John Singer, a mute character in Carson McCullers' novel The Heart Is a Lonely Hunter (1940)
See also Jonathan Singer (disambiguation) John Singer Sargent