11th dimension may refer to:

• 11-dimensional supergravity, a field theory that combines the principles of supersymmetry and general relativity.
• 11-dimensional spacetime, which appears in M-theory, a proposed "master theory" that unifies the five superstring theories
  • Introduction to M-theory
• "11th Dimension" (song), by Julian Casablancas, 2009
• 11th Dimension (album), by Ski Mask the Slump God, 2024

• Superstring theory
• 'Pataphysics

This disambiguation page lists articles associated with the title 11th dimension.
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