2009  The Graveyard Book by Neil Gaiman
2008  The Yiddish Policemen's Union by Michael Chabon
2007  Rainbows End by Vernor Vinge
2006  Spin by Robert Charles Wilson
2005  Jonathan Strange and Mr. Norrell by Susanna Clarke
2004  Paladin of Souls by Lois McMaster Bujold
2003  Hominids by Robert J. Sawyer
2002  American Gods by Neil Gaiman
2001  Harry Potter and The Goblet of Fire by J. K. Rowling
2000  A Deepness in the Sky by Vernor Vinge

1999  To Say Nothing of the Dog: Or How We Found the Bishop's Bird Stump At Last by Connie Willis
1998  Forever Peace by Joe Haldeman
1997  Blue Mars by Kim Stanley Robinson
1996  The Diamond Age: Or, a Young Lady's Illustrated Primer by Neal Stephenson
1995  Mirror Dance by Lois Mcmaster Bujold
1994  Green Mars by Kim Stanley Robinson
1993  Doomsday Book by Connie Willis and A Fire Upon the Deep by Vernor Vinge
1992  Barrayar by Lois McMaster Bujold
1991  The Vor Game: The Continuing Adventures of Miles Vorkosigan by Lois McMaster Bujold
1990  Hyperion by Dan Simmons

1989  Cyteen by C. J. Cherryh
1988  The Uplift War by David Brin
1987  Speaker for the Dead by Orson Scott Card
1986  Ender's Game by Orson Scott Card
1985  Neuromancer by William Gibson
1984  Startide Rising by David Brin
1983  Foundation's Edge by Isaac Asimov
1982  Downbelow Station by C. J. Cherryh
1981  The Snow Queen by Joan D. Vinge
1980  The Fountains of Paradise by Arthur Charles Clarke

1979  Dreamsnake by Vonda N. Mcintyre
1978  Gateway by Frederik Pohl
1977  Where Late the Sweet Birds Sang by Kate Wilhelm
1976  The Forever War by Joe Haldeman
1975  The Dispossessed: An Ambiguous Utopia by Ursula Le Guin
1974  Rendezvous With Rama by Arthur Charles Clarke
1973  The Gods Themselves by Isaac Asimov
1972  To Your Scattered Bodies by Philip Jose Farmer
1971  Ringworld by Larry Niven
1970  The Left Hand of Darkness by Ursula Le Guin

1969  Stand on Zanzibar by John Brunner
1968  Lord of Light by Roger Zelazny
1967  The Moon Is a Harsh Mistress by Robert A. Heinlein
1966  Dune by Frank Herbert and This Immortal by Roger Zelazny
1965  The Wanderer by Fritz Leiber
1964  Way Station by Clifford D. Simak
1963  The Man in the High Castle by Philip K. Dick
1962  Stranger in a Strange Land by Robert A. Heinlein
1961  A Canticle for Leibowitz by Walter M. Miller
1960  Starship Troopers by Robert A. Heinlein

1959  A Case of Conscience by James Blish
1958  The Big Time by Fritz Leiber
1957       no award was given.
1956  Double Star by Robert A Heinlein
1955  They'd Rather Be Right by Frank Riley
1954       no award was given.
1953  The Demolished Man by Alfred Bester

1951  Retro Award - Farmer in the Sky by Robert A. Heinlein
1946  Retro Award - The Mule by Isaac Asimov