Not guilty may refer to:

• Not guilty plea, a plea by which a person charged with one or more criminal offenses denies committing them
• Acquittal, the legal result of a verdict of not guilty
• Not Guilty (1908 film), a French film
• Not Guilty (1910 film), an American film by the Thanhouser Company
• Not Guilty (1919 film), a British film
• Not Guilty (1921 film), an American film
• Not Guilty (1947 film), a French film
• "Not Guilty" (song), a song by George Harrison