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- David S. Garnett, (born 1947), UK, editor of the New Worlds, Orbit and Zenith anthology series
- Henry Gee, (born 1962), UK, editor of the Nature Futures series of science fiction short stories and the anthology of them
- Anna Genoese, USA, editor for Tor Books; originated Tor's paranormal romance imprint
- Hugo Gernsback (1884–1967), USA, (born Luxembourg), pioneer editor of Amazing Stories magazine
- Nick Gevers, (born 1965), UK, anthologist and editor for PS Publishing
- Vic Ghidalia, (born 1926), USA, collaborated on anthologies with Roger Elwood
- Sheila Gilbert, USA, longtime editor and co-owner of DAW Books
- Diana Gill, USA, SF and fantasy editor at HarperCollins
- Laura Ann Gilman, (born 1967), USA, freelance editor; formerly with Berkley, Dutton and New American Library
- Robert Gleason, USA, longtime editor at Tor Books; formerly Tor's Editor-in-Chief
- H. L. Gold (1914–1996), USA, (born Canada), founding editor of Galaxy magazine
- Stephen Goldin, (born 1947), USA, anthologist and editor of the SFWA Bulletin
- Cele Goldsmith Lalli (1933–2002), USA, editor of Amazing Stories and Fantastic magazines in the 1960s
- Liz Gorinsky, USA, editor at Tor Books
- Charles L. Grant, (1942–2006), USA, horror writer and anthologist
- Martin Greenberg (born 1918), USA, anthologist and founder of Gnome Press
- Martin H. Greenberg (1941–2011), USA, prolific anthologist
- Anne Groell, USA, senior editor at Bantam Spectra
- Eileen Gunn (born 1945), USA, editor & publisher of the Infinite Matrix webzine
- James Gunn (born 1923), USA, editor of The Road to Science Fiction series of teaching anthologies; professor emeritus of science fiction literature at the University of Kansas and director of the Center for the Study of Science Fiction
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