The Bourne Ultimatum is a 2007 action-thriller film directed by Paul Greengrass. Although it shares its name with Ludlum's titular 1990 novel, its plot is entirely different. The third installment in the Jason Bourne film series after The Bourne Identity (2002) and The Bourne Supremacy (2004), the screenplay was written by Tony Gilroy, Scott Z. Burns and George Nolfi and based on a screen story of the novel by Gilroy. Matt Damon reprises his role as Ludlum's signature character, former CIA assassin and psychogenic amnesiac Jason Bourne.

Additional cast members who star alongside Damon include Julia Stiles, David Strathairn, Scott Glenn, Paddy Considine, Édgar Ramirez, Albert Finney, and Joan Allen. In the film, Bourne continues his search for information about his past before he was part of Operation Treadstone and becomes a target of a similar assassin program. Produced by The Kennedy/Marshall Company in association with Ludlum Entertainment, The Bourne Ultimatum premiered at ArcLight Hollywood on July 25, 2007 before it was theatrically released by Universal Pictures on August 3 in the United States.

Upon release, it received universal acclaim from critics, who considered it to be the best in the Bourne series. It grossed $444.1 million worldwide against its budget of $110 million becoming, at the time, Damon's highest-grossing film with him as the lead. It was chosen by National Board of Review as one of the top ten films of 2007 and went on to win all three of its nominations at the 80th Academy Awards: Best Film Editing, Best Sound Mixing and Best Sound Editing.

A fourth film without the involvement of Damon, titled The Bourne Legacy, was released in August 2012, and the fifth film (a direct sequel to Ultimatum that reprises Damon as the lead role), titled Jason Bourne, was released in July 2016.