A
- Cecil Adams (Saw IV) - Billy Otis
- Alec (The Pumpkin Karver) - David J. Wright
- Harper Alexander (2001 Maniacs) - Giuseppe Andrews
- The Alien (Alien, Aliens, Alien3, Alien Resurrection, Alien vs. Predator, Alien vs. Predator Requiem) - Bolaji Badejo
- Mickey Altieri (Scream 2) - Timothy Olyphant
- Martin Asher (Taking Lives) – Ethan Hawke
- Enzo Avolfi (Giallo) - Adrien Brody
Read more about this topic: List Of Horror Film Antagonists