Mirror symmetry is symmetry with respect to a reflection.

Mirror symmetry may also refer to:

• Mirror symmetry (string theory), a relation between two Calabi–Yau manifolds in string theory
• Homological mirror symmetry, a mathematical conjecture about Calabi–Yau manifolds made by Maxim Kontsevich
• Mirror symmetry conjecture, a mathematical conjecture about mirror symmetry
• P-symmetry, symmetry under parity inversion
• Mirror-symmetry breaking