Apostasy (disambiguation)

Apostasy is the formal disaffiliation from, or abandonment or renunciation of, a religion by a person.
 * Apostasy in Christianity
 * Apostasy in Islam
 * Apostasy in Judaism

Apostasy may also refer to:
 * Apostasia of 1965 (Apostasy of 1965), often called the Apostacy (Apostasia), a Greek coup
 * Apostasy (1948 film), Japanese film by Keisuke Kinoshita
 * Apostasy (2017 film), 2017 British drama film directed by Daniel Kokotajlo
 * Apostasy (band), a Swedish black metal band
 * The Apostasy, a 2007 album by Polish band Behemoth