2011  Blackout/All Clear - Connie Willis

2010  The City & The City - China Mieville
         The Windup Girl - Paolo Bacigalupi

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

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

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

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

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

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

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