Nightmares can refer to:

• Disturbing dreams, for which see Nightmare.
• Several films, including:
  • Shayatin el lail (1965), called Nightmares in English
  • Nocní mury (1970), TV movie called Nightmares in English
  • Zmory (1979), called Nightmares in English
  • Nightmares (1980)
  • Nightmares (1983)
  • Nightmares (2004)
  • Nightmares, an episode of Buffy The Vampire Slayer