March 29 - April 1, 2013
Swancon
Perth, Western Australia
Science Fiction and Fantasy
Author Guest: Charles Stross

April 5-7, 2013
Ad-Astra
Toronto, ON, Canada
Science Fiction and Fantasy
Guests of Honor: Jim Butcher, Stephen Hunt, Ben Bova, Scott Caple

April 5-7, 2013
RavenCon
Richmond, VA
Science Fiction and Fantasy
Guests of Honor: Kevin J Anderson, Rebecca Moesta

April 5-7, 2013
Willycon
Wayne, NE
Science Fiction and Fantasy
Sponsored by Wayne State College SciFi Fantasy Club
Author Guest of Honor: Anne Bishop

April 10-12, 2013
Minicon
Bloomington, MN
Conventions run by the Minnesota Science Fiction Society
Author Guest of Honor: Karl Schroeder

April 11-13, 2013
Eaton Science Fiction Conference
Riverside, CA
Science fiction media, co-sponsored by The Science Fiction Research Association

April 12-14, 2013
Odyssey Con
Madison, WI
Science fiction and fantasy
Author Guests of Honor: Alex Bledsoe, Kevin Hearne

April 12-14, 2013
Windy City Pulp & Paper Convention
Lombard, IL
Science fiction and fantasy magazines

April 19-21, 2013
FilkOntario
Toronto, Ontario, Canada
Science Fiction Folk Festival

April 19-21, 2013
JordanCon
Roswell, GA
Convention devoted to Robert Jordan's Wheel of Time series
Author Guest of Honor: Patrick Rothfuss

April 26-28, 2013
EerieCon
Niagara Falls, NY
Sponsored by the Buffalo Fantasy League
Guests of Honor: Jack McDevitt, Carl Frederick