Chaos theory is a mathematical theory describing erratic behavior in certain nonlinear dynamical systems.

Chaos Theory may also refer to:

• Chaos Theory (film), a 2008 comedy-drama
• "Chaos Theory", an episode of ER (season 9)
• "Chaos Theory", an episode of CSI: Crime Scene Investigation (season 2)
• "Chaos Theory", an episode of The Unit (season 4)
• "Chaos Theory" (Agents of S.H.I.E.L.D.)
• Jurassic World: Chaos Theory, a Netflix-exclusive show in the Jurassic Park franchise

• Chaos Theory (demo), a 2006 computer demo by Conspiracy
• "Chaos Theory", an episode of video game Life Is Strange
• Chaos Theory: Part 1, a 2012 EP by Like A Storm
• The Chaos Theory, a 2002 album by Jumpsteady
• Tom Clancy's Splinter Cell: Chaos Theory, a 2005 video game
  • Chaos Theory – The Soundtrack to Tom Clancy's Splinter Cell: Chaos Theory, by Amon Tobin, 2005

• All pages with titles beginning with Chaos Theory
• All pages with titles containing Chaos Theory