Illegal, or unlawful, is used to describe something that is prohibited or not authorized by law or, more generally, by rules specific to a particular situation (such as a game).

Illegal may also refer to:

• Illegal (1932 film)
• Illegal (1955 film)
• Illegal (band), a short-lived rap duo
• Illegal (single release), a track from pop singer Shakira's 2005 release, Oral Fixation Vol. 2

Illegal is also used as a noun to refer to illegal immigrants.

Illegal