The Bourne Ultimatum is the third Jason Bourne novel written by Robert Ludlum and a sequel to The Bourne Supremacy (1986). First published in 1990, it was the last Bourne novel to be written by Ludlum himself. Eric Van Lustbader wrote a sequel titled The Bourne Legacy fourteen years later.

The Bourne Ultimatum was adapted into a film of the same name starring Matt Damon and was released in the U.S. on August 3, 2007. As in the 2004 film, The Bourne Supremacy, The Bourne Ultimatum has a completely different plot from the novel.