Plan 9 or Plan Nine may refer to:

• Plan 9 (band), a psychedelic rock band from Rhode Island
• Plan 9, an album by Big Guitars From Memphis with Rick Lindy
• "Plan 9", a song on the 1993 album Gorgeous by electronica band 808 State
• "Plan 9 Channel 7", a song on the 1979 album Machine Gun Etiquette by punk group The Damned
• Plan 9 Records, an independent record label that was owned by Glenn Danzig of Misfits

• Plan 9 (2015 film), an independent 2015 film as a parody remake of the original
• Plan 9 from Bell Labs, an operating system developed by Bell Laboratories as Unix's successor
  • Plan 9 from User Space, a port of many Plan 9 from Bell Labs libraries and applications to Unix-like operating systems
  • 9P (protocol), a network protocol developed as part of Plan 9 from Bell Labs sometimes referred to as Plan 9 Filesystem Protocol
• Plan 9 from Outer Space, a 1959 science fiction film directed by Ed Wood, Jr.
  • Plan 9 from Outer Space (video game), based on the film
• Plan Nine Publishing
• Breaking Benjamin, who went by "Plan 9" during 1999

This disambiguation page lists articles associated with the title Plan 9.
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