A biohazard, or biological hazard, is a biological substance that poses a threat to the health of living organisms.

Biohazard may also refer to:

  • Biohazard (band), an American band
  • Biohazard (1988 demo tape)
  • Biohazard (album), 1990
  • Biohazard (book), a 1999 non-fiction book by Ken Alibek
  • Biohazard (film), a 1985 science-fiction horror film
  • BioHazard, a combat robot
  • Resident Evil, known in Japan as Biohazard, a Japanese horror media franchise
  • Resident Evil (1996 video game), the first game in the series, known as Bio Hazard in Japan
  • Resident Evil (2002 video game), a remake of the above game, known as Biohazard in Japan
  • Resident Evil 7: Biohazard, a 2017 video game

See also

  • Bio-Hazard Battle, a 1992 video game
  • Biohazzard Records, a German independent record label