Illegal may refer to:
Law
- Violation of law
- Crime, an act committed in violation of criminal law
- An illegal immigrant
Entertainment
- The Illegal (novel) (2015), by Canadian writer Lawrence Hill
- Illegal - Justice, Out of Order, an Indian web series
Films
- Illegal (1932 film), British
- Illegal (1955 film), American
- Illegal (2010 film), Belgian
- The Illegal (2019), film starring Suraj Sharma
Bands
- Illegal (group), a 1990s rap group
- Los Illegals, a music band
Music
- Illegal, a 2006 compilation album by Panjabi MC
- "Illegal" (Shakira song), 2005
- "Illegal" (PinkPantheress song), 2025
Food and drink
- Ilegal Mezcal, a brand of mezcal from Guatemala
- Illegal (cocktail), a cocktail made with Ilegal Mezcal
See also
- Illegal agent, also known as "non-official cover_(intelligence_gathering)"
- Illegals Program, Russian spies arrested in the United States in 2010
- The Illegal (disambiguation)
- Illegalism, an anarchist philosophy which embraced criminality as a lifestyle