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- Keith Baker, (born 1969) freelance author of Dungeons & Dragons
- R. Scott Bakker, (born 1967) author of the Prince of Nothing series
- Catherine Banner, (born 1989) author of The Last Descendants series
- Gloria Barberi, (born 1955) author of I Custodi
- James Barclay, born 1965) author of Chronicles of the Raven and Legends of the Raven, both trilogies
- Clive Barker, (born 1952) author of the The Books of Abarat series
- William Barnwell, (born 1943) author of the Blessing Papers series
- J. M. Barrie, (1860-1937) author of Peter Pan
- T. A. Barron, (born 1952) author of Merlin Effect and The Lost Years of Merlin
- Don Bassingthwaite, author of several Dungeons & Dragons gaming novels
- Samit Basu, (born 1979) author of The Simoqin Prophecies and The Manticore's Secret
- Gael Baudino, (born 1955) author of Dragonsword and Duel of Dragons
- L. Frank Baum, (1856–1919) author of the Land of Oz series
- Peter S. Beagle, (born 1939) author of The Last Unicorn and A Fine and Private Place
- Frank Beddor author of The Looking Glass Wars
- John Bellairs, (1938–1991) author of The Face in the Frost and The House with a Clock in Its Walls
- Hans Bemmann, (1922-2003) author of The Stone and the Flute and Erwins Badezimmer
- Carol Berg
- Steve Berman
- Julie Bertagna
- Anne Bishop, author of the Black Jewels Trilogy
- Holly Black, (born 1971) co-author of (with Tony DiTerlizzi) The Spiderwick Chronicles and Arthur Spiderwick's Field Guide to the Fantastical World Around You
- James P. Blaylock, (born 1950)
- Enid Blyton, (1897-1968) author of The Enchanted Wood and The Magic Faraway Tree
- Maya Kaathryn Bohnhoff, (born 1954)
- Pseudonymous Bosch, author of The Name of This Book Is Secret and If You're Reading This, It's Too Late
- Hannes Bok, (1914–1964)
- Ray Bradbury, (1920–2012) author of Fahrenheit 451 and Something Wicked This Way Comes
- Marion Zimmer Bradley, (1930–1999) author of the Darkover series and editor of the Sword and Sorceress series of anthologies
- Rebecca Bradley
- Gillian Bradshaw, (born 1956) (also writes historical fiction and science fiction novels)
- Ernest Bramah (1868–1942) author of the Kai Lung stories
- Libba Bray
- Marie Brennan, author of Doppelganger
- Peter V. Brett, (born 1973) author of The Painted Man and The Desert Spear
- Rae Bridgman author/illustrator of The MiddleGate Books - The Serpent's Spell, Amber Ambrosia, Fish & Sphinx
- Patricia Briggs, author of Moon Called and Blood Bound
- Kristen Britain, author of the Green Rider novels
- C. Dale Brittain, author of the Yurt novels
- Terry Brooks, (born 1944) author of the Shannara novels, Magic Kingdom of Landover novels and Word & Void series
- Steven Brust, (born 1955) author of the Dragaera novels
- Michael Buckley, author of The Sisters Grimm series
- Lois McMaster Bujold, (born 1949) author of The Curse of Chalion and its sequels
- Emma Bull
- Kenneth Bulmer
- Chris Bunch
- Edgar Rice Burroughs, author of the Tarzan novels
- Jim Butcher, (born 1971), author of Dresden Files and Codex Alera novels
Read more about this topic: List Of Fantasy Authors