October 5-7, 2012
Conjecture/ConChord
San Diego, CA
"Conjecture is an educational and literary-oriented SF/Fantasy convention and ConChord is a southern California filk music convention."
Author guest: Patricia C. Wrede

October 5-7, 2012
Contraflow
New Orleans, LA
Science fiction, fantasy and comics
Author guest: Victor Vinge

October 12-14, 2012
Archon
St. Louis, MO
science fiction and fantasy
Toastmaster: Joe Haldeman

October 12-14, 2012
Gaithersburg, MD
Capclave
Science Fiction convention sponsored by the Washington Science Fiction Association
Author Guests of Honor: John Scalzi and Nick Mamatas

October 12-14, 2012
Con*Stellation
Huntsville, AL
Convention sponsored by the North Alabama Science Fiction Association
Guest of Honor: David B. Coe

October 12-14, 2012
Realmscon
Corpus Christi, TX
Genre media, anime and gaming

October 13-14, 2012
Maynooth, County Kildare, Ireland
Octocon
National Irish Science Fiction Convention
Guest of Honor: Liz Williams

October 18-21, 2012
Albany, NY
Albacon
Science fiction and fantasy

October 19-21, 2012
Montreal, Quebec, Canada
Con*Cept
Science fiction and fantasy

October 19-21, 2012
Wichita, KS
Encounters
Multi-genres

October 19-21, 2012
Denver, CO
MilehiCon
Literary Science Fiction
Author Guest of Honor: Cherie Priest

October 20, 2012
Bristol, England
Bristol-CON
Science fiction and fantasy
Guests: John Meany, Gareth L. Powell, Anne Sudworth

October 20-21, 2012
FACTS
Comics, science fiction and anime
Ghent, Belgium

October 26-28, 2012
Hal-Con
Halifax, NS, Canada
Science fiction and fantasy
Author guests: R.A. Salvatore, Brandon Sanderson, Rachael Caine

October 26-28, 2012
Rossville, GA
HallowCon
Fantasy & Horror

October 26-28, 2012
Tampa FL
Necronomicon
Science Fiction, Fantasy and Horror fans
Guest of Honor: Linnea Sinclair

October 26-28, 2012
Steamcon
Seattle, WA
Theme: Victorian Monsters
Guest of Honor: Kim Newman