International Fantasy Award
Presented by: Panel of SF fans and professionals
For: Best science fiction or fantasy book
| Winner | The Lord of the Rings | J. R. R. Tolkien |
| Nominee | No Award Given This Year | (********) |
| Winner | A Mirror for Observers | Edgar Pangborn |
| Runner-up | Mission of Gravity | Hal Clement |
| Winner | More Than Human | Theodore Sturgeon |
| Runner-up | The Demolished Man | Alfred Bester |
| Winner | Lands Beyond | Willy Ley+L. Sprague de Camp |
| Winner | City | Clifford D. Simak |
| Runner-up | Takeoff | C. M. Kornbluth |
| Finalist | Player Piano | Kurt Vonnegut, Jr. |
| Winner | Fancies and Goodnights | John Collier |
| Runner-up | The Day of the Triffids^Revolt of the Triffids | John Wyndham |
| Finalist | The Illustrated Man | Ray Bradbury |
| Winner | The Exploration of Space | Arthur C. Clarke |
| Runner-up | Dragons in Amber | Willy Ley |
| Finalist | Rockets, Jets, Guided Missiles and Spaceships | Jack Coggins+Fletcher Pratt |
| Winner | The Conquest of Space | Willy Ley+Chesley Bonestell |
| Winner | Earth Abides | George R. Stewart |