Self may refer to:

• Self (psychology), a key construct in several schools of psychology
• Self (philosophy), a unified being which is the source of an idiosyncratic consciousness
• Soul, a self aware ethereal substance particular to a unique living being
• Atman, the individual self in Hindu philosophy. See also jiva.
• Paramatman, within Hinduism this describes the Supreme Soul of perfect consciousness.
• Organism, a living complex adaptive system of organs
• Self (novel), by Yann Martel
• William Self, an English novelist
• Self (band), mostly the brainchild of one Matt Mahaffey
• Solar Electric Light Fund, a non-profit charitable organization
• Self (car)
• Self, a sculpture by Marc Quinn

In computing:

• This (computer science), the object on which the currently executing method has been invoked
• Self programming language, an experimental test system for language design in the 1990s

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