Heresy is any belief or theory that is strongly at variance with established beliefs or customs.

Heresy may also refer to:

Music Heresy (band), an English hardcore punk band

Albums Heresy (Lustmord album), 1990 Heresy (Paradox album), 1989

Songs "Heresy" (Rush song), 1991 "Heresy", a song by Pantera from the 1990 album Cowboys from Hell "Heresy", a song by Nine Inch Nails from the 1994 album The Downward Spiral

Other uses Heresy (radio series), a British comedy talk show Heresy: Kingdom Come, a collectible card game The Heresies Collective, an American feminist collective Heresies: A Feminist Publication on Art and Politics, a second wave feminist magazine (1977–1993) by the Heresies Collective Heresy, a 2001 novel in the Aquasilva Trilogy by Anselm Audley

See also Hearsay (disambiguation) Heretic (disambiguation)