Black box may mean:
Systems
- Black box, any component in a system in which only the input and output characteristics are of interest, without regard to its internal mechanism or structure
Transportation
- Black box (transportation), a commonly used informal term, a durable onboard data-recording device used in various forms of transport
Film
- Black Box (film) - An Argentine film (Caja Negra)
Music
- Black Box (band), a music group popular in the late 1980s and early 1990s
- Black Box Recorder (band), English pop/indie music group, debut album in 1998
- Black Box: The Complete Original Black Sabbath (1970-1978), collection of the albums by the original members of Black Sabbath
- Black Box - Wax Trax! Records: The First 13 Years, a box set album compiling songs released on Wax Trax! Records between 1980 and 1993
- Black Box (album) a compilation album by free jazz group Naked City, which was a rerelease of Torture Garden with Leng Tch'e.
- Black Box (song), a song by the group Panurge.
Literature
- Black Box (book), a book by Israeli writer Amos Oz
Science
- Black box testing, testing a system without knowledge of its internals
- Black box theory, a philosophical theory
Computer Software
- Blackbox, a window manager that works on X Window System platforms
- BlackBox Component Builder, the component-based development environment for Component Pascal
Management
- Black Box, linking people and performance
Other
- Black box (phreaking), a device built by phone phreaks during the 1960s and 1970s to defeat toll charges
- Black box theater, a simple, somewhat unadorned performance space, usually a large square room with black walls and a flat floor
- Black box warning, a U.S. warning on a prescription drug that means it carries a significant risk of fatal side effects
- Black Box Corporation, a Pennsylvania-based supplier of computer network hardware
- Black Box (game), a board and computer game
- Black Box Games, a video game studio bought by Electronic Arts
- Project Blackbox, the prototype name for Sun Modular Datacenter
- Black Box (comics) a fictional character in the Marvel Comics Marvel Universe
- In copyright law, a single-purpose device which allows encrypted satellite television signals to be viewed without payment
- Black Box, the common name for the tree species Eucalyptus largiflorens
- The Black Box (serial), a 1915 film serial
- "Black Box" is one of a number of nicknames for the Nuclear Football.