The Backrooms is an urban legend and creepypasta describing an endless maze of randomly generated office rooms and other environments. It is characterized by the smell of moist carpet, walls with a monochromatic tone of yellow, and buzzing fluorescent lights. Internet users have expanded upon this concept by creating different "levels" of the Backrooms and "entities" which inhabit them.

The original version came from a two-paragraph 4chan comment on a post asking for "unsettling images", where an anonymous user invented a story based on one of the photos. The Backrooms drew comparisons to various other horror trends and media, including the photography of liminal spaces, the SCP Foundation collaborative fiction project, and the six-hour-long album series Everywhere at the End of Time.

Since its original creation, The Backrooms has been expanded into various other forms of media and Internet culture, including video games, collaborative fiction wikis, and YouTube videos.