Zach Hughes (1936–2020) was an American science fiction writer known for thoughtful, idea-driven novels often exploring themes of human evolution, alien contact, and the long-term future of civilization. His work appeared mainly during the 1970s and 1980s, a period rich in experimental and philosophical science fiction.

Hughes contributed to the tradition of philosophical science fiction that focused less on action and more on how technology and discovery affect human identity. His work represents the thoughtful mid-list authors who helped broaden science fiction beyond simple adventure stories.