The winners were announced at Aussiecon III in Melbourne, Australia on September 4, 1999. Complete nomination list. 1999 Hugo winners.
Children of God by Mary Doria Russell (Villard)
Darwinia by Robert Charles Wilson (Tor)
Distraction by Bruce Sterling (Bantam Spectra)
Factoring Humanity by Robert J. Sawyer (Tor)
To Say Nothing of the Dog by Connie Willis (Bantam Spectra)
"Aurora in Four Voices" by Catherine Asaro (Analog, Dec 1998)
"Get Me to the Church On Time" by Terry Bisson (Asimov's, May 1998)
"Oceanic" by Greg Egan (Asimov's, Aug 1998)
"Story of Your Life" by Ted Chiang (Starlight 2 Tor)
"The Summer Isles" by Ian R. MacLeod (Asimov's, Oct/Nov 1998)
"Divided by Infinity" by Robert Charles Wilson (Starlight 2, Tor, Nov 1998)
"Echea" by Kristine Kathryn Rusch (Asimov's, Jul 1998)
"The Planck Dive" by Greg Egan (Asimov's, Feb 1998)
"Steamship Soldier on the Information Front" by Nancy Kress (Future Histories 1997; Asimov's, Apr 1998)
"Taklamakan" by Bruce Sterling (Asimov's, Oct/Nov 1998)
"Time Gypsy" by Ellen Klages (Bending the Landscape: Science Fiction Overlook)
"Zwarte Piet's Tale" by Allen Steele (Analog, Dec 1998)
"Cosmic Corkscrew" by Michael A. Burstein (Analog, Jun 1998)
"Maneki Neko" by Bruce Sterling (F&SF, May 1998)
"Radiant Doors" Michael Swanwick (Asimov's, Sep 1998)
"The Very Pulse of the Machine" by Michael Swanwick (Asimov's, Feb 1998)
"Whiptail" by Robert Reed (Asimov's Oct/Nov 1998)
"Wild Minds" by Michael Swanwick (Asimov's May 1998)
The Dreams Our Stuff Is Made Of: How Science Fiction Conquered the World by Thomas M. Disch (The Free Press)
Hugo, Nebula & World Fantasy Awards by Howard DeVore (Advent:Publishers)
Science-Fiction: The Gernsback Years by Everett F. Bleiler (Kent State University Press)
Spectrum 5: The Best in Contemporary Fantastic Art, edited by Cathy Fenner & Arnie Fenner (Underwood Books)
The Works of Jack Williamson: An Annotated Bibliography and Guide by Richard A. Hauptman (NESFA Press)
Babylon 5 "Sleeping in Light"
Dark City
Pleasantville
Star Trek: Insurrection
The Truman Show
Gardner Dozois
Scott Edelman
David G. Hartwell
Patrick Nielsen Hayden
Stanley Schmidt
Gordon Van Gelder
Jim Burns
Bob Eggleton
Donato Giancola
Don Maitz
Nick Stathopoulos
Michael Whelan
Interzone edited by David Pringle
Locus edited by Charles N. Brown
The New York Review of Science Fiction edited by Kathryn Cramer, Ariel Haméon, David G. Hartwell & Kevin Maroney
Science Fiction Chronicle edited by Andrew Porter
Speculations edited by Kent Brewster
Ansible edited by Dave Langford
File 770 edited by Mike Glyer
Mimosa edited by Nicki & Richard Lynch
Plokta edited by Alison Scott & Steve Davies
Tangent edited by David Truesdale
Thyme edited by Alan Stewart
Bob Devney
Mike Glyer
David Langford
Evelyn Leeper
Maureen Kincaid Speller
Freddie Baer
Brad Foster
Ian Gunn
Teddy Harvia
Joe Mayhew
D. West
Sponsored by Dell Magazines
Kage Baker2
Julie E. Czerneda2
Nalo Hopkinson2
Susan R. Matthews2
James Van Pelt2
2 - second and final year of eligibility