Mad Max is an Australian post-apocalyptic action film series and media franchise created by George Miller and Byron Kennedy. It began in 1979 with Mad Max, and was followed by three sequels: Mad Max 2 (1981, released in the United States as The Road Warrior), Mad Max Beyond Thunderdome (1985) and Mad Max: Fury Road (2015); Miller directed or co-directed all four films. Mel Gibson starred in the first three films and Tom Hardy took over as Max in the fourth film.

The series follows the adventures of Max Rockatansky, a police officer in a future Australia which is experiencing societal collapse due to war and critical resource shortages. When his wife and child are murdered by a vicious biker gang (who also burned Max's partner to death), Max avenges his loved ones by wiping out the gang and becomes a drifting loner in the "Wasteland". As Australia devolves further into barbarity, Max finds himself helping pockets of civilization on several occasions. Despite his motives initially being nothing more than to obtain fuel and supplies, they gradually become more selfless and altruistic.

The series has been well received by critics, with each film marked "Certified Fresh" on the film review aggregation website Rotten Tomatoes; Mad Max 2 and Fury Road in particular have been ranked among the best action films ever made. The series has also had a significant influence on popular culture, most notably apocalyptic and post-apocalyptic fiction, and encompasses works in additional media, including video games and comic books. In 2016, Fury Road became the first film of the Mad Max franchise to receive Academy Award recognition, winning six of its ten nominations.

North American rights to the original film were previously owned by Metro-Goldwyn-Mayer (via the libraries of Orion Pictures and American International Pictures), however, in 2021, North American rights to the original film reverted to Warner Bros., thus WB now owns the entire Mad Max franchise (except for Australia and New Zealand).