The Sundance Film Festival is a film festival that takes place annually in the state of Utah, in the United States. It is the largest independent cinema festival in the U.S. Held in January in Park City, Salt Lake City, and Ogden, Utah, as well as the Sundance Resort, the festival is the premier showcase for new work from American and international independent filmmakers. The festival comprises competitive sections for American and international dramatic and documentary films, and a group of non-competitive showcase sections, including the Sundance Online Film Festival.

Sundance began in Salt Lake City in 1978 as the Utah/US Film Festival in an effort to attract more filmmakers to Utah. Founded by Sterling Van Wagenen and John Earle with Chairperson Robert Redford, the goal of the festival was to showcase what the potential of independent film could be. At the time, the main focus of the event was to present a series of retrospective films and filmmaker panel discussions; however it also included a small program of films made outside the Hollywood system, commonly known as independent films.

The festival has changed over the decades from a low-profile venue for small-budget, independent creators from outside the Hollywood system to a media extravaganza for Hollywood celebrity actors, directors from studios that are subsidiaries of the major studios, paparazzi, and luxury-goods company sponsors giving gifts to the attendees.