"Paranoid" is a song by English heavy metal band Black Sabbath, released in 1970 off the band's second studio album, Paranoid (1970). It is the first single from the album, while the B-side is the song "The Wizard". The song is widely regarded as one of the greatest heavy metal songs of all time. It reached number 4 on the UK Singles Chart and number 61 on the US Billboard Hot 100.

Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distorted guitars, extended guitar solos, emphatic beats and loudness.