30 Days of Night is a 2007 American vampire horror film based on the comic book miniseries of the same name. The film was directed by David Slade and stars Josh Hartnett and Melissa George. The story focuses on an Alaskan town beset by vampires as it enters into a 30-day-long polar night.

30 Days of Night was originally pitched as a comic, then as a film, but it was rejected. Years later, Steve Niles showed IDW Publishing the idea and it took off. The film was produced on a budget of $30 million and grossed over $75 million at the box office during its six-week run starting on October 19, 2007. Critical reviews were mixed.

Its success resulted in a franchise that followed, including: a prequel miniseries, Blood Trails in 2007, a sequel miniseries, Dust to Dust in 2008, and a straight-to-home video sequel film Dark Days in 2010.