Law Abiding Citizen is a 2009 American vigilante action thriller film directed by F. Gary Gray, written by Kurt Wimmer, and starring Jamie Foxx and Gerard Butler (who also co-produced). The film takes place in Philadelphia, telling the story of a man driven to seek justice while targeting not only his family's killer but also those who have supported a corrupt criminal justice system, intending to assassinate anyone supporting the system. Law Abiding Citizen was filmed on location in Philadelphia, and released theatrically by Overture Films in North America on October 16, 2009.

The film grossed $127.9 million worldwide but received generally negative reviews from critics. Despite this, it was nominated for a Saturn Award as the Best Action/Adventure/Thriller Film of the year, as well as NAACP Image Award nominations for both Foxx (Outstanding Actor in a Motion Picture) and Gray (Outstanding Directing in a Motion Picture).