The Man Who Knew Too Much

The Man Who Knew Too Much may refer to:

• The Man Who Knew Too Much (book), a 1922 book of detective stories by G. K. Chesterton
• The Man Who Knew Too Much (1934 film), a film by Alfred Hitchcock starring Leslie Banks and Edna Best (unrelated to the 1922 Chesterton book)
• The Man Who Knew Too Much (1956 film), a film by Alfred Hitchcock starring James Stewart and Doris Day (also unrelated to the 1922 Chesterton book)
• "The Man Who Knew Too Much" (article), a 1996 Vanity Fair article by Marie Brenner about Jeffrey Wigand
• The Man Who Knew Too Much: Alan Turing and the Invention of the Computer, a book by David Leavitt
• "The Man That Knew Too Much", a song by Silverchair from Young Modern
• "The Man Who Knew Too Much", the 22nd episode of the sixth season of the American TV series Supernatural