D
- Roald Dahl, (1916–1990) author of Charlie and the Chocolate Factory and James and the Giant Peach
- Avram Davidson, (1923–1993)
- S. J. Day, (born 1973)
- Pamela Dean, (born 1953)
- John DeChancie
- L. Sprague de Camp, (1907–2000) author of The Compleat Enchanter & Conan stories
- Alessandro Defilippi
- Michael de Larrabeiti, (born 1934)
- Charles de Lint, (born 1951)
- Kathryn Deans, author of Shimmer
- Tom Deitz, (1952–2009
- Joseph Delaney, author of The Wardstone Chronicles
- Troy Denning
- Graham Diamond
- Tony DiTerlizzi, (born 1969) co-author of (with Holly Black) The Spiderwick Chronicles and Arthur Spiderwick's Field Guide to the Fantastical World Around You
- Stephen Donaldson, (born 1947) author of The Chronicles of Thomas Covenant
- Sara Douglass
- Ann Downer, (born 1960)
- David Drake
- Tobias Druitt, author of the Corydon Trilogy
- Diane Duane, (born 1952) author of the Young Wizards
- Dave Duncan
- Lord Dunsany, (1878–1957) (Edward Plunkett)
- Jeanne DuPrau
- David Anthony Durham, (born 1969) author of Acacia: The War With The Mein
Read more about this topic: List Of Fantasy Authors