A
- Rafael Ábalos, author of Grimpow
- Lynn Abbey (born 1948)
- Joe Abercrombie
- Daniel Abraham
- Richard Adams, (born 1920) author of Watership Down
- Alexandra Adornetto, (born 1992) author of The Strangest Adventures series
- Joan Aiken, (1924–2004) author of The Wolves of Willoughby Chase
- Wendy Alec, author of the Chronicles of Brothers series
- Lloyd Alexander, (1924–2007) author of the Chronicles of Prydain
- Alan Burt Akers, pseudonym of Kenneth Bulmer
- Hans Christian Andersen, (1805–1875) authored fairy tales, including The Little Mermaid
- Poul Anderson, (1926–2001)
- Ilona Andrews, husband and wife writing team. Author of the Kate Daniels series and The Edge series
- F. Anstey, (1856–1934)
- Piers Anthony, (born 1934) author of Xanth
- K.A. Applegate, (born 1956) author of Everworld
- Tom Arden, (born 1966)
- Kelley Armstrong, author of the Women of the Otherworld
- Danilo Arona
- Sarah Ash
- Mike Ashley
- Nancy Asire
- Robert Lynn Asprin, (1946–2008) author of the Myth Adventures and contributing author to Thieves World
- A.A. Attanasio, (born 1951)
- Amelia Atwater-Rhodes, (born 1984)
- Anselm Audley, (born 1982)
- Fiona Avery
Read more about this topic: List Of Fantasy Authors