Tron is an American science fiction media franchise created by Steven Lisberger and Bonnie MacBird, first introduced with the 1982 film Tron. The series primarily takes place within "the Grid", a series of digital virtual realities where computer programs exist as sentient entities. Many of these programs resemble their human creators, known as Users, and are often forced to compete in lethal gladiatorial contests. The title refers to the central character Tron, a self-governing security program designed to defend the Grid's system in the original film.

Produced and distributed by Walt Disney Pictures, the franchise currently comprises three feature films: Tron (1982), Tron: Legacy (2010), and Tron: Ares (2025). The series has expanded into multiple forms of media, including novels, comic books, video games, soundtrack albums, and theme park attractions. It also inspired the animated television series Tron: Uprising, which aired on Disney XD from 2012 to 2013.

The Tron films are frequently cited for their innovative achievements in visual effects, sound design, and electronic music. Despite mixed reviews from critics, the Tron franchise attained cult status, with the original film receiving particular recognition for its distinctive visual style and pioneering use of early computer-generated imagery. The films have collectively grossed $600 million at the worldwide box office.

Each Tron film introduces a distinct digital virtual reality, all of which are collectively known as "the Grid". In all of these systems, programs exist as sentient entities, many of which resemble their human creators, known as Users, and are frequently compelled to participate in deadly gladiatorial contests. Each program carries an identity disc, which functions as a record of its experiences within the Grid and can also be used as a weapon. The Grid features a variety of distinct elements, including vehicles, weapons, and ships, such as light cycles and recognizers. Programs may be destroyed through "deresolution", which means the program is deleted by dissolving into pixels.

Depicted in the original Tron and Tron: Ares, the ENCOM Grid was created as the operating system of ENCOM International.

Depicted in Tron: Legacy and Tron: Uprising, the Flynn Grid was created by Kevin Flynn after his experience within the original 1982 ENCOM Grid. Flynn created the second system on a private server located beneath his arcade. Intended to be a virtual utopia with an intricate city design, the Flynn Grid is vastly more complex in existence and function. This Grid spontaneously gave rise to a unique class of self-generating programs called Isomorphic Algorithms, or ISOs. The Grid features a dark atmosphere and translucent shades of blue, green, teal, and white.

Depicted in Tron: Ares, the Dillinger Grid was created by Dillinger Systems and is bathed in shades of red, black, and gray.

Kevin Flynn, a genius software programmer and video game developer, seeks to expose Ed Dillinger, an executive at his former employer ENCOM, for stealing his game designs. While attempting to retrieve evidence of the theft from the company's computer system, Flynn is digitized and transported into the Grid, a virtual environment governed by the authoritarian Master Control Program (MCP). Within this digital realm, he joins forces with Tron—a security program created by Flynn's colleague Alan Bradley—to challenge the MCP's domination and restore freedom to the system. After destroying the MCP, Flynn returns to the real world with proof of Dillinger's plagiarism and is reinstated as ENCOM's new CEO.