|  2019  | |
| winner | Blackfish City, Sam J. Miller | 
|  2018  | |
| winner | The Genius Plague, David Walton | 
|  2017  | |
| winner | Central Station, Lavie Tidhar | 
|  2016  | |
| winner | Radiomen, Eleanor Lerman | 
|  2015  | |
| winner | The First Fifteen Lives of Harry August, Claire North | 
|  2014  | |
| winner | Strange Bodies, Marcel Theroux | 
|  2013  | |
| winner | Jack Glass, Adam Roberts | 
|  2012  | |
| winner | (tie) The Highest Frontier, Joan Slonczewski | 
| winner | (tie) The Islanders, Christopher Priest | 
|  2011  | |
| winner | The Dervish House, Ian McDonald | 
|  2010  | |
| winner | The Windup Girl, Paolo Bacigalupi | 
|  2009  | |
| winner | (tie) Song of Time, Ian R. MacLeod | 
| winner | (tie) Little Brother, Cory Doctorow | 
|  2008  | |
| winner | In War Times, Kathleen Ann Goonan | 
|  2007  | |
| winner | Titan, Ben Bova | 
|  2006  | |
| winner | Mindscan, Robert J. Sawyer | 
|  2005  | |
| winner | Market Forces, Richard Morgan | 
|  2004  | |
| winner | Omega, Jack McDevitt | 
|  2003  | |
| winner | Probability Space, Nancy Kress | 
|  2002  | |
| winner | (tie) Terraforming Earth, Jack Williamson | 
| winner | (tie) The Chronoliths, Robert Charles Wilson | 
|  2001  | |
| winner | Genesis, Poul Anderson | 
|  2000  | |
| winner | A Deepness in the Sky, Vernor Vinge | 
|  1999  | |
| winner | Brute Orbits, George Zebrowski | 
|  1998  | |
| winner | Forever Peace, Joe Haldeman | 
|  1997  | |
| winner | Fairyland, Paul J. McAuley | 
|  1996  | |
| winner | The Time Ships, Stephen Baxter | 
|  1995  | |
| winner | Permutation City, Greg Egan | 
|  1994  | |
| winner | no award | 
|  1993  | |
| winner | Brother to Dragons, Charles Sheffield | 
|  1992  | |
| winner | Buddy Holly Is Alive and Well on Ganymede, Bradley Denton | 
|  1991  | |
| winner | Pacific Edge, Kim Stanley Robinson | 
|  1990  | |
| winner | The Child Garden, Geoff Ryman | 
|  1989  | |
| winner | Islands in the Net, Bruce Sterling | 
|  1988  | |
| winner | Lincoln's Dreams, Connie Willis | 
|  1987  | |
| winner | A Door Into Ocean, Joan Slonczewski | 
|  1986  | |
| winner | The Postman, David Brin | 
|  1985  | |
| winner | The Years of the City, Frederik Pohl | 
|  1984  | |
| winner | The Citadel of the Autarch, Gene Wolfe | 
|  1983  | |
| winner | Helliconia Spring, Brian W. Aldiss | 
|  1982  | |
| winner | Riddley Walker, Russell Hoban | 
|  1981  | |
| winner | Timescape, Gregory Benford | 
|  1980  | |
| winner | On Wings of Song, Thomas M. Disch | 
|  1979  | |
| winner | Gloriana, Michael Moorcock | 
|  1978  | |
| winner | Gateway, Frederik Pohl | 
|  1977  | |
| winner | The Alteration, Kingsley Amis | 
|  1976  | |
| winner | no award | 
| retrospective prize | The Year of the Quiet Sun, Wilson Tucker | 
|  1975  | |
| winner | Flow My Tears, the Policeman Said, Philip K. Dick | 
|  1974  | |
| winner | (tie) Rendezvous with Rama, Arthur C. Clarke | 
| winner | (tie) Malevil, Robert Merle | 
| nonfiction book | The Cosmic Connection, Carl Sagan | 
|  1973  | |
| winner | Beyond Apollo, Barry N. Malzberg | 
| special award for excellence in writing | Dying Inside, Robert Silverberg |