2025 – The Tainted Cup – Robert Jackson Bennett
2024 – Some Desperate Glory – Emily Tesh
2023 – Nettle & Bone – T. Kingfisher
2022 – A Desolation Called Peace – Arkady Martine
2021 – Network Effect – Martha Wells
2020 – A Memory Called Empire – Arkady Martine
2019 – The Calculating Stars – Mary Robinette Kowal
2018 – The Stone Sky – N. K. Jemisin
2017 – The Obelisk Gate – N. K. Jemisin
2016 – The Fifth Season – N. K. Jemisin
2015 – The Three-Body Problem – Cixin Liu
2014 – Ancillary Justice – Ann Leckie
2013 – Redshirts – John Scalzi
2012 – Among Others – Jo Walton
2011 – Blackout/All Clear – Connie Willis
2010 – The City & the City – China Miéville (tie)
2010 – The Windup Girl – Paolo Bacigalupi (tie)
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 & 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 – Connie Willis
1998 – Forever Peace – Joe Haldeman
1997 – Blue Mars – Kim Stanley Robinson
1996 – The Diamond Age – Neal Stephenson
1995 – Mirror Dance – Lois McMaster Bujold
1994 – Green Mars – Kim Stanley Robinson
1993 – Doomsday Book – Connie Willis (tie)
1993 – A Fire Upon the Deep – Vernor Vinge (tie)
1992 – Barrayar – Lois McMaster Bujold
1991 – The Vor Game – 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 C. 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 – Ursula K. Le Guin
1974 – Rendezvous with Rama – Arthur C. Clarke
1973 – The Gods Themselves – Isaac Asimov
1972 – To Your Scattered Bodies Go – Philip José Farmer
1971 – Ringworld – Larry Niven
1970 – The Left Hand of Darkness – Ursula K. 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 – …And Call Me Conrad (This Immortal) – Roger Zelazny (tie)
1966 – Dune – Frank Herbert (tie)
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 Jr.
1960 – Starship Troopers – Robert A. Heinlein
1959 – A Case of Conscience – James Blish
1958 – The Big Time – Fritz Leiber
1956 – Double Star – Robert A. Heinlein
1955 – They’d Rather Be Right – Mark Clifton & Frank Riley
1954 – No award
1953 – The Demolished Man – Alfred Bester