Hidden universe or variation, may refer to:

• The Hidden Universe (1950 book) a science fiction anthology by Ralph Milne Farley
• The Hidden Universe (novella) a science fiction story by Ralph Milne Farley, originally published in Amazing Stories magazine, featured in his anthology Strange Worlds (Ralph Milne Farley collection)
• Hidden Universe 3D (film) a 2013 Australian IMAX3D documentary film about deep space

• Hidden (disambiguation)
• Universe (disambiguation)
• The Hidden Reality (book) 2011 physics book by Brian Greene
• Hidden sector (physics), the hidden part of the universe
• Hidden-variable theory (physics) of the universe
• Dark universe (disambiguation)