Toxicity is the second studio album by heavy metal band System of a Down. Featuring the heaviness and aggression of System of a Down's debut studio album, Toxicity features more melody, harmonies, and singing than the band's aforementioned album.

Categorized primarily as alternative metal, and nu metal, Toxicity features elements of multiple genres including folk, progressive rock, jazz, Armenian music, and Greek music, including prominent use of instruments such as the sitar, banjo, keyboards and piano. 

The album contains a wide array of political and non-political themes such as the overpopulation of prisons, the CIA, the environment, group sex, drug addiction, and groupies.