B
- Baby Oopsie Daisy (Demonic Toys and its sequels)
- The Baby (It's Alive, two sequels and a 2008 remake)
- Angela Baker (Sleepaway Camp, two theatratical sequels, an unofficial sequel and a direct-to-DVD sequel) - Felissa Rose and Pamela Springsteen
- Johnny Charles Bartlett (The Frighteners) - Jake Busey
- Patrick Bateman (American Psycho) – Christian Bale
- Cluny Barr (The Beachcomber) - Ian Whyte
- Thomas Barclay (P2 (film)) - Wes Bentley
- Brenda Bates (Urban Legend) - Rebecca Gayheart
- Norman Bates (Psycho, two sequels and a 1990 prequel) - Anthony Perkins (Vince Vaughn in the 1998 remake)
- Karl Berger, Sr. (Violent Shit) - Andreas Schnaas
- Karl Berger, Jr. (Violent Shit II: Mother Hold My Hand) - Andreas Schnaas
- Bernie (Moonstalker) - Blake Gibbons
- Christiano Berti (Tenebrae) - John Steiner
- Billy (Black Christmas) - Bob Clark and Nick Mancuso
- Billy (Saw and its sequels) - Tobin Bell
- Ben Willis (I Know What You Did Last Summer and its sequel) - Muse Watson
- Ernie Bishop (Scar) - Ben Cotton
- Blade (Puppet Master and its sequels)
- Jerry Blake (The Stepfather) - Terry O'Quinn
- Mrs. Blankenship (Halloween: The Curse of Michael Myers) - Janice Knickrehm
- Dr. Bonham (Halloween: The Curse of Michael Myers) - Alan Echeverria
- The Boogeyman (Boogeyman and its sequels) - Andrew Glover
- Granny Boone (2001 Maniacs) - Lin Shaye
- Hucklebilly Boone (2001 Maniacs) - Ryan Fleming
- Belial Bradley (Basket Case)
- Patricia Ann Bradley (The Frighteners) - Dee Wallace Stone
- Roman Bridger (Scream 3) - Scott Foley
- Martin Bristol (Malevolence) - Jay Cohen
- Earl Brooks (Mr. Brooks) – Kevin Costner
- Bubba (Nailgun Massacre) - Beau Leland
- George W. Buckman (2001 Maniacs) - Robert Englund
- Peter Bunch (The New York Ripper) - Andrea Occhipinti
- Roy Burns (Friday the 13th: A New Beginning) - Dick Wieand
- Butterball Cenobite (Hellraiser) - Simon Bamford
Read more about this topic: List Of Horror Film Antagonists