Jason Charles Bourne is a fictional character and the protagonist of a series of novels by Robert Ludlum and subsequent film adaptations. He first appeared in the novel The Bourne Identity (1980), which was adapted for television in 1988. The novel was very loosely adapted in 2002 into a feature film under the same name and starred Matt Damon in the lead role.

The character has appeared in nine sequel novels (the last seven were written by Eric Van Lustbader) with the latest published in 2012. Along with the first feature film, The Bourne Identity (2002), Jason Bourne also appears in three sequel movies The Bourne Supremacy (2004) and The Bourne Ultimatum (2007), both with Damon again in the lead role. Jeremy Renner stars in the fourth film of the franchise, The Bourne Legacy, released in August 2012. Damon stated in interviews that he would not do another Bourne film without Paul Greengrass, who had directed the second and third installments.

Jason Bourne has a tormented past, which continues to influence him throughout his lifetime. Jason Bourne is but one of many aliases used by David Webb. Webb is a career foreign service officer and a specialist in Far Eastern affairs. Before the events in The Bourne Identity, Webb had a Thai wife named Dao and two children named Joshua and Alyssa in Phnom Penh, the capital of Cambodia. Webb's wife and two children were inadvertently killed during the Vietnam War when a fighter plane strayed into Cambodia, dropped two bombs and strafed a spot near the Mekong River. However, unknown to Bourne, Joshua survived. Due to Cambodia's neutrality in the war, every nation disclaimed the plane, and, therefore, no one took responsibility for the incident. Having nothing left to live for, Webb went to Saigon and, under the careful guidance of Alex Conklin, ended up training for an elite Top Secret Special Forces unit called Medusa. Within that select organization Webb was known only by his code name, Delta One.