Imaginary can refer to:

• Imagination, a mental faculty
• Imaginary number, a concept in mathematics
• Imaginary time, a concept in physics
• Imaginary (sociology), a concept in sociology
• "Imaginary" (song), a song by Evanescence
• Object of the mind, an object of the imagination
• The Imaginary (Sartre), a philosophical work by Jean-Paul Sartre