John Singer
John Singer may refer to:
- Seymour Jonathan Singer, cell biologist and author
- John Singer (homeschooler), American killed in a standoff over homeschooling
- John Singer (actor, born 1923), English actor
- John Singer (16th-century actor), English actor and dramatist
- John Webb Singer, British businessman
- John Singer, a mute character in Carson McCullers' novel ''The Heart Is a Lonely Hunter''