Hellboy II: The Golden Army is a 2008 American superhero film based on the Dark Horse Comics character of the same name, created by Mike Mignola. Produced by Universal Pictures, Relativity Media, Lawrence Gordon/Lloyd Levin Productions, and Dark Horse Entertainment, and distributed by Universal, it is a sequel to Hellboy (2004) and is the second live-action film in the franchise. Directed and written by Guillermo del Toro from a story he co-wrote with Mignola, the film stars Ron Perlman as Hellboy, alongside Selma Blair, Doug Jones, Jeffrey Tambor, and John Hurt. In the film, Hellboy and the Bureau of Paranormal Research and Defense must battle a mythical prince who plans to reclaim the world for his magical kindred.

Hellboy II: The Golden Army was released in the United States on July 11, 2008 to generally positive reviews from critics; with praised towards its fantasy atmosphere, as well as Perlman and the other cast's acting performances. It grossed $168.3 million against a production budget of $82.5–85 million. The film received a nomination for Best Makeup at the 81st Academy Awards.

The franchise was rebooted in 2019, with a new film simply titled Hellboy, and was released by Lionsgate. Following the critical and commercial failure of the film, a second reboot was announced in 2023, titled Hellboy: The Crooked Man.