Anthrax may refer to several articles:

• The highly contagious disease. See Anthrax disease.
• The genus of bombyliid fly. See Anthrax (fly).
• A heavy metal music group. See Anthrax (band).
• An anarcho-punk band. See Anthrax (Anarcho-punk band)
• Castle Anthrax, a coven of seductive young women, from the movie Monty Python and the Holy Grail