8 mm may refer to:
Films 8mm (film), a 1999 American crime thriller 8mm 2, a 2005 direct-to-video thriller film Super 8 (2011 film), a 2011 American science fiction film
Film technology 8 mm film, a motion picture film format Super 8 film Single-8 film 8 mm video format, three related videocassette formats
Firearms 8 mm caliber, firearm cartridges 7.92×57mm Mauser, designated 8 mm Mauser
Music 8mm (band), a rock band from Los Angeles, California