John Kramer may refer to:
John Kramer (darts player) (born 1956), retired American professional darts player John Kramer, better known as Jigsaw, fictional character in the Saw franchise John Kramer, bassist with the Arthur Lyman Group Jack Kramer (John Albert Kramer, 1921–2009), American tennis player John R. Kramer (1937–2006), former Tulane University Law School dean John H. Kramer, emeritus professor at Pennsylvania State University John Krämer, German writer John Kramer (footballer)
See also John Cramer (disambiguation)