John Katzenbach (born June 23, 1950) is an American author of popular fiction.

Son of Nicholas Katzenbach, former United States Attorney General, Katzenbach worked as a criminal court reporter for the Miami Herald and Miami News and as a featured writer for the Herald's Tropic magazine.

His In the Heat of the Summer (1982) novel[2] was nominated for an Edgar Award and then became the movie The Mean Season (1985), starring Kurt Russell and Mariel Hemingway.

Two more of his books were made into films in the United States: Just Cause (1995) with Sean Connery and Hart's War (2002) with Bruce Willis.

A fourth book, The Wrong Man, was made in 2011 as the French TV film Faux Coupable.