The Locus Award for Best Science Fiction Novel is an annual award presented by Locus, a science fiction and fantasy magazine. The award for Sci-Fi novels was first presented in 1980. However previous to that, from 1971 they award a more generic "Best Novel" award, which coincidentally was only awarded to sci-fi books, so I have also included those books here.
 Ringworld
| 3.67 |
 The Lathe of Heaven
| 4.06 |
 The Gods Themselves
| 3.91 |
 Rendezvous with Rama
| 3.93 |
 The Dispossessed
| 4.16 |
 The Forever War
| 3.96 |
 Where Late The Sweet Birds Sang
| 3.29 |
 Gateway
| 3.87 |
 Dreamsnake
| 3.43 |
 Titan
| 3.67 |
 The Snow Queen
| 3.44 |
 The Many-Colored Land
| 4.25 |
 Foundation's edge
| 3.94 |
 Startide Rising
| 3.99 |
 The Integral Trees
| 3.85 |
 The Postman
| 3.5 |
 Speaker for the Dead
| 4.11 |
 The Uplift War
| 3.89 |
 Cyteen
| 3.39 |
 Hyperion
| 4.27 |
 The Fall of Hyperion
| 4.17 |
 Barrayar
| 3.99 |
 Doomsday Book
| 3.79 |
 Green Mars
| 3.76 |
 Mirror Dance
| 4.06 |
 The Diamond Age: or, A Young Lady's Illustrated Primer
| 3.99 |
 Blue Mars
| 3.85 |
 The Rise of Endymion
| 4.1 |
 To Say Nothing of the Dog
| 4.14 |
 Cryptonomicon
| 4.27 |
 The Telling
| 3.69 |
 Passage
| 3.64 |
 The Years of Rice and Salt
| 3.52 |
 Ilium
| 3.86 |
 The Confusion
| 4.27 |
 The System of the World
| 4.34 |
 Accelerando
| 3.62 |
 Rainbows End
| 3.44 |
 The Yiddish Policemen's Union
| 3.6 |
 Anathem
| 4.21 |
 Boneshaker
| 3.33 |
 Blackout
| 3.62 |
 All Clear
| 4.03 |
 Embassytown
| 3.81 |
 Redshirts
| 3.86 |
 Abaddon's Gate
| 4.19 |
 Ancillary Sword
| 4 |
 Ancillary Mercy
| 4.15 |
 Death's End
| 4.38 |
 The Collapsing Empire
| 4.09 |
 The Calculating Stars
| 4.06 |
 The City in the Middle of the Night
| 3.21 |
 Network Effect
| 4.39 |
 A Desolation Called Peace
| 4.18 |
 The Kaiju Preservation Society
| 3.92 |
 System Collapse
| 4.16 |