Grizzly Man is a 2005 American documentary film by German director Werner Herzog. It chronicles the life and death of bear enthusiast and conservationist Timothy Treadwell and his girlfriend Amie Huguenard at Katmai National Park, Alaska. The film includes some of Treadwell's own footage of his interactions with brown bears before 2003, and of interviews with people who knew or were involved with Treadwell, in addition to professionals who deal with wild bears.

Treadwell and Huguenard, both from New York, had bonded over their common passion for bears and animal conservation, and she would occasionally accompany him on his trips to the park. Having stayed past the summer season one year, the pair were attacked and killed in the park by a bear on October 5, 2003. The couple's remains were discovered by a patrolling pilot, and an audio recording of the attack was found among the remains; the bear was later encountered and killed by the pilot's rescue team.

The film was co-produced by Discovery Docs and Lions Gate Entertainment. The film's soundtrack was composed by Richard Thompson.

It received widespread acclaim from critics and is now considered to be among the best films of the 2000s and of the 21st century.