Onesie Conventions

There have been a lot of one-off conventions: Some intentionally so; others not so much. We collect them here.

We do not include conventions which are part of a series such as Worldcon, Eastercon, Eurocon, etc., regardless of whether they have similar names or not. Nor do we include conventions which were intended as one-shots but later came to be seen as an instance of a continuing convention. (E.g., Smofcon 0 or Midwestcon 0.)

See also Early Conventions for a list of conventions (mostly one-shots) held before the end of 1946.

Convention	Date	Location
1947–49
“Beanie Con”	Summer 1947	Cadillac, MI
“Minneapolis Thing”	September 4-6, 1948	Minneapolis
Beercon	September 5–6, 1948	Milwaukee
DeCon	December 28–29, 1948	Detroit
Norwescon	April 23, 1949	Portland, OR
1950s
Hydracon	July 1-3, 1950	New York City
Lynnhavention	July 2–4, 1950	Lynn Haven, FL
NECON	October 14, 1951	Bradford, UK
HECon	May 1953	Cleveland, OH
Riverina Conference	August 8-9, 1953	Albury, Australia
Wiscon	September 20, 1953	Fond du Lac, WI
Medcon	November 7, 1953	Medway, UK
X-Con	April 10, 1954	San Francisco
Border Cities Con	July 3–5, 1954	Detroit
Canberra Science Fiction Conference	March 30-April 1, 1956	Canberra, Australia
Eastercon	April 1, 1956	Fond du Lac, WI
Relaxacon	April 7-9, 1956	Carmel Valley, CA
MegaCon 1	Easter 1958	Amador, CA
IllWisCon	July 4-6, 1958	Chicago
Nullcon	August 1956	New York, NY
Bangcon	1958	Bangkok, Thailand
Forry-FortyTwo Con	November 21-23, 1958	Los Angeles, CA
Fanarcon	December 26-28, 1958	New York
Nevadacon	August 26-27, 1959	Boulder City, NV
London Symposium	October 3, 1959	London, UK
Phyllcon	January 3, 1959	Milwaukee
1960s
Consolacon	September 1-4, 1961	New Orleans, LA
Faircon	July 3-6, 1964	New York City
KingCon	1967	Kingston, ON
Gotcon	March 24-27, 1967	Gothenberg, Sweden
Melbourne Science Fiction Conference	April 12-14, 1968	Melbourne, Vic
1968 Belknap College Tolkien Conference	October 1968	Center Harbor, NH
London Minicon	November, 1967	London, UK
NEOSFS New Years Con	December 31, 1968-January 1, 1969	Sandusky, OH
Con 69	May 24–26, 1969	Lund, Sweden
Conference on the Bibliography of Science Fiction	March 1, 1969	NY, NY
1970s
T.A.N.S.T.A.A.F.L. CON	February 12-14, 1970	Vestal, NY
PresiCon	February 12-15, 1970	Los Angeles
SF Conference at the Midlands Art Center	June 14, 1970	Birmingham, UK
Multicon 70	June 26-28, 1970	Oklahoma City, OK
Partycon	December 19-20, 1970	Dallas, TX
Mondo*Con	January 1971	New York, NY
Mini-Melcon	April 9-11 1971	Melbourne, VIC
Gnomoclave '71	June 11-13, 1971	Knoxville, TN
BYO-Con	December 26-28, 1972	Melbourne, VIC
Ratcon	1973	Adelaide, NSW
Logcon 73	1973	Lund, Sweden
SUNYcon	April 14, 1973	Stony Brook, NY
Cal Tech Conference	March 8-9, 1974	Pasadena, CA
South Virginia Con	March 30, 1974	Farmville, VA
Medievalcon	May 25-27, 1974	Santa Barbara, CA
Benecia	July 5-7 1974	Marietta, GA
SF Symposium	October 22-25, 1974	Fort Collins, CO
Infinity 74	November 29-December 1, 1974	New York, NY
No Con	1975	New Orleans, LA
Hopcon	March 7-9, 1975	Baltimore, MD
Murphycon	April 11-13, 1975	Albany, NY
NocresCon	August 8–10, 1975	Minneapolis, MN
Palm Beach Con	August 30-September 1, 1975	Palm Beach, FL
Columbicon	August 8-10, 1975	Columbia, MD
Beyond This Horizon	October 23-25, 1973	Sunderland, UK
Mexicon 1	November 22-23, 1975	Guadalajara, Mexico
Blackpool Fan Con	February 6-8, 1976	Blackpool, UK
Romecon	February 13-15, 1976	Rome, GA
Sflaggcon	June 18-20, 1976	NY, NY
Lexicon	June 18-20, 1976	Lexington Park, MD
Intercon	August 13-14, 1976	Salt Lake City, UT
Des Moines Con	August 28-31, 1976	Des Moines, IA
Texacon	September 1, 1976
Fourth Dimension Con	October 1-3, 1976	Tallmadge, OH
Bunnycon	October 22-25, 1976	McAfee, NJ
Alpha Draconis	October 29-31 1976	Toronto, ON
Spring-Con	December 3-5, 1976	Washington, DC
Arkon-Orlando	December 10-12, 1976	Orlando, FL
Luunicon	1977	London, UK
Monaclave	January 28-30, 1977	Melbourne, Australia
Steven & Don's Con	March 4-6, 1977	New Orleans, LA
Clayton Con	March 12-13, 1977	Lawndale, CA
Harcon	April 1-3, 1977	Harriman, TN
Yuccacon	April 15-17, 1977	Colorado State U., Fort Collins, CO
Mudcon	May 8, 1977	Stony Brook, NY
Eraticon	May 28-30, 1977	Houston, TX
Nocrescon II	May 27-30, 1977	Minneapolis, MN
Summercon	July 29-31, 1977	Toronto, ON
Hippotocon	August 12-14, 1977	Homewood, IL
Great Combined Milford and Clarion Decennial Jubilee, Colloquium and Beer Bash	August 26-27, 1977	East Lansing, MI
Mooncon	August 31-September 2, 1977	Florida Keys
Freddiecon	August 30-31, 1977	Fredericksburg, VA
Saltcon	October 14-15, 1977	Salt Lake City, UT
Steven & Don's Memphis Halfacon	December 1977	Memphis, TN
HBHS Minicon	December 10, 1977	Huntington Beach, CA
Bacon	1978	Lund, Sweden
Ozymandias	June 9-11, 1978	Toronto, ON
Empirecon 1	July 14-16, 1978	NY, NY
Hark!Con	July 22, 1978	Richmond, VA
LICon	August 11-13, 1978	Plainview, LI, NY
Un-Con	September 9, 1978	Winnipeg, MB
UnreelCon	October 27-29, 1978	Toronto
Coscon	November 3-5, 1978	Pasadena, CA
Tropiccon	November 23-25, 1978	Orlando, FL
Kampuscon	January 20, 1979	Lawrence, KS
FortCon	February 9-11, 1979	Ft. Collins, CO
Quakecon	February 16-18, 1979	San Francisco, CA
The Fantasy Symposium	February 15-18, 1979	San Jose, CA
Whatacon	February 24, 1979	San Diego, CA
Science Fiction Week-end	March 23-24, 1979	Los Angeles, CA
Just Imagicon	May 24-27, 1979	Memphis, TN
Quasarcon	June 16-18, 1979	Adelaide, Australia
Filkon I	July 27-29, 1979	Chicago, IL
Stellarcon '79	August 25-26, 1979	Joplin, MO
PosthumusCon	August 25-26, 1979	Tombstone, AZ
SF and Space Expo	October 6-8, 1979	San Francisco, CA
Novacon 9 West	November 2-4, 1979	Albany, NY
Tropicon	November 23-25, 1979	Orlando, FL
KulaCon	November 30-December 2, 1979	Vancouver, BC
1980s
Fantasy Worlds Midwinter Festival	February 16-17, 1980	Berkeley, CA
Hoosier Con	February 29 - March 2, 1980	South Bend, IN
Leapcon	February 29-March 1, 1980	Arlington, VA
Lasfapacon	July 1-2, 1980	LA, CA
Imaginitzacon	September 26-28, 1980	Memphis, TN
A Mid-Winter Convention	January 23-25, 1981	Long Beach, CA
Disneycon 1	February 12-15, 1981
Datclone	February 27-March 1, 1981	Gettysburg, PA
Cinecon	April 17-21, 1981	Melbourne, Australia
Nucon	May 10-13, 1981	Kings Cross, Australia
Filkcon West	June 5-7, 1981	Los Angeles, CA
Tolkon	August 21-24, 1981	Sydney, Australia
Triciticon '81	September 18-20, 1981	Vestal, NY
ConNiption	October 9-11, 1981	White Plains, NY
Augacon	November 27-29, 1981	San Mateo, CA
MagiCon	January 23-24, 1982	New Orleans, LA
Smoffcon 1	January 23-25, 1982	Melbourne, Australia
CONgestion	March 19-21, 1982	Oklahoma City, OK
LEXICON	May 28-31, 1982	Leicester, UK
Brandycon	June 18-20, 1982	Claymont, DE
Summercon 82	July 2-4, 1982	Elmhurst, NY
NorthStar	September 25, 1982	Toronto
Fencon	October 16, 1982	Cambridge, UK
RA CON	February 4-6, 1983	Edinburgh, Scotland
Constellation Con	February 18-21, 1983	Vancouver, BC
Microcon '83	March 4-6, 1983	San Marcos, TX
Pendulum	April 22-24, 1983	Ottawa, Canada
Colorado Mountain Con	May 6-8, 1983	Leadville, CO
Shorcon	June 4, 1983	Long Island, NY
Valcon	June 10-12, 1983	Valpariso, IN
Millenium	June 10-12, 1983	Toronto, ON
Starcall	August 5-7, 1983	Arlington, VA
InVention	September 23-25, 1983	Glasgow, Scotland
Incognicon	November 11-13, 1983	Ottawa, Canada
Outre-vention	November 18-20, 1983	Salt Lake City, UT
Fantasy Festival	November 25-27, 1983	Dallas, TX
Harrycon	1984	Melbourne, Australia
Sunuvacon 1	1984	Laconia, NH
Esotericon	January 13-15, 1984	Hasbrouck Heights, NJ
Brave New Con	January 13-15, 1984	Reston, VA
Wamcon	February 15-17, 1984
Capcon	April 13-15, 1984	Lubbock, TX
Petuniacon	April 20-22, 1984	Oakland, CA
Onocon '84	May 4-6, 1984	Syracuse, NY
Con-Juration	June 1-3, 1984	Tulsa, OK
Circle Con	September 21-23, 1984	Indianapolis, IN
Concentric '84	November 2-4, 1984	Columbia, MO
R-Con	November 2-4, 1984	Rochester, NY
LASFS 50th Anniversary Banquet	November 3, 1984	LA, CA
Windycon I	1985	Wellington, NZ
Dragoncon 3	January 27, 1985	East Sheen, UK
Chimeracon	January 26-27, 1985	Chapel Hill, NC
Take My Con...Please	February 1-3, 1985	Silver Spring, MD
Silicone	February 15-18, 1985	Edinburgh, Scotland
Alti-Ego's	April 26-28, 1985	Denver, CO
XIIcon	September 26-29, 1986	Glasgow, Scotland
4E 2B 70	November 21, 1986	Los Angeles, CA
Conception	13-15 February 1987	Leeds, UK
Context	November 27-29, 1987	Houston, TX
Clonespiracy	January 15–17, 1988	Leicester, UK
Name That Con	April 22-24, 1988	St. Louis, MO
No-No-Con	February 1988	Edmonton, AB
Conine	5-7 August 1988	Oxford, UK
Octoberfeast	14-15 October 1989	York, Australia
Prefab Trout	September 22-24, 1989	Glasgow, UK
1990s
Random Realities -- The Convention	April 13-15, 1990	El Segundo, CA
Chimera 1	July 20-22, 1990	Schaumburg, IL
Imagine 90	1990	Rochester, NY
Victoricon	1991	Melbourne, Australia
Lepricon '91	1991	Greensboro, NC
NoSF3	1991	New Orleans, LA
CON/FUSION	February 16-18, 1991	San Diego, CA
Reconnaissance	February 22–24, 1991	Cardiff, UK
Twentycon	July, 1991	Birmingham, UK
Rhino	July 12-14, 1991	London, ON, Canada
ConFictionary	September, 1991	Adelaide, Australia
Soupçon	October 1991	Jersey, UK
Philip K. Dick Celebration	19-20 October 1991	Essex, UK
Eroticon Six	November 1991	Gravesend, UK
Altercon 666	November 8-10, 1991	London
German X-Con	December 27-30, 1991	Dusseldorf, Germany
The Contract	February 14, 1992	Adelaide, Australia
Conflict	April 5–8 1992	Caithness, Scotland
Discovery 1	May 24-28, 1992	Columbus, OH
Haldecon	13 June 1992	Sydney, Australia
Farmertacon	August 8, 1992	Tampere, Finland
Communicon 2	August 14-16, 1992	Wolfville, NS, Canada
DraCon	October 24, 1992	Bristol, UK
Conyac	1993	Amsterdam, Netherlands
Hurricon	February 26-28, 1993	Fort Walton Beach, FL
Conflation	March 5-7, 1993	MO]]
Nocon	April 16-19, 1993	Niagara Falls, NY
Con-Troll	April 16-18, 1993	Houston, TX
Boise Fantasy Arts Convention	April 24-25, 1993	Boise, ID
Magic Carpet Con	May 7-9, 1993	Dalton, GA
Conscience '93	August 13-15, 1993	Stockholm, Sweden
CupCon	October 29-31 1993	Melbourne, Australia
Sealcon	1994	Eindhoven, Netherlands
Misdemeanour	February 1994	Somerset, UK
ArtCon	August 5-7, 1994	Dallas, TX
Continuum	August 27-28, 1994	Wellington, NZ
Cascadecon '94	August 26-28, 1994	Portland, OR
Chococon	September 2-4 1994	Harrisburg, PA
Consanguinity I	October 7-9, 1994	Lisle, IL
Misconstrued	1995	Somerset, UK
Concinnity 95	January 29, 1995	Melbourne, Australia
Science Fiction Saturday / Evcon / Science Fiction Saturday	May 27, 1995	Vancouver, BC, Canada
Interception	June 24-25, 1995	Stevenage, UK
Aussiecon Reunion Convention	September 22-24, 1995	Melbourne, Australia
Attitude: The Convention	February 14-17, 1996	Malvern, UK
Quartercon	August 15-17, 1997	Bergen, Norway
Nexus	September 12-14, 1997	Maitland, FL
Conquest	October 18-19, 1997	Winnipeg, MB
SECCON	May 28-30, 1999	Stevenage, UK
2000s
ReConnaissance	March 30-April 2 2000	Bergen, Norway
Aliens Stole My Handbag!	June 30-July 2, 2000	Shepperton, UK
ConVex	September 30, 2000	Adelaide, Australia
Hogmanaycon	December 29, 2000–January 1, 2001	Glasgow, Scotland
Kublacon 2001	April 6-8, 2001	Beloit, WI
Filky Days	June 8-10, 2001	Leverkusen, Germany
Conjuration	June 15-17, 2001	Columbia, MO
2001: A Celebration of British Science Fiction	June 28-July 1, 2001	Brian Aldiss, Stephen Baxter, Nicola Griffith, Gwyneth Jones, Ken MacLeod, John Clute, Judith Clute
ConSortium	June 28-July 1, 2001	David Weber, Michael Stackpole, Margaret Fincannon, Clif Davis
Tucker Tribute	August 3–4, 2001	Bloomington, IL
Conspec	September 15-16, 2001	Edmonton, AB
Reminiscon Fifty	February 9, 2002	Cardiff, UK
Damn Fine Convention	May 3-6 2002	London
Druncon 1	May 25-26, 2003	Peterborough, UK
ReRepetercon	2004
Construction 2005	July 9-10, 2005	San Jose, CA
Cthulhu One	April 29-May 1, 2005	Madison, WI
Tolcon	May 13-15, 2005	Seattle, WA
The Ring Goes Ever On	August 11-15, 2005	Birmingham, UK
Conclave	September 30-October 3, 2005	Adelaide, Australia
Wellscon	November 25, 2005	Adelaide, Australia
Last Guest Con	January 28-29, 2006	SeaTac, WA
Frolicon	April 13-16, 2006	Atlanta, GA
Heinlein Centennial	July 6-8, 2007	Kansas City, MO
Night's Edge	November 10-11, 2007	Perth, Australia
ZombieCon	September 5–7, 2008	Birmingham, UK
ValhallaCon	September 4-6, 2009	Bellingham, WA
2010s
ManorCon	August 13-15, 2010	Somerset, UK
Canberra Science Fiction Convention	May 5-6, 2011	Canberra, Australia
Dellacon	September 16-18, 2011	Wisconsin Dells, WI
VillainCon	October 1-2, 2011	Perth, Australia
HalswayCon Days 2012	August 3-5, 2012	Somerset, UK
Return of the Ring	16-20 August, 2012	Loughborough University, England
Andromeda One	September 21, 2013	Birmingham, UK
GalaxyCon	October 31-November 2, 2014	Las Vegas
Operacon	March 12-15, 2015	Milwaukee, WI
Archipelacon	June 25–28, 2015	Åland, Finland
SmofCon South	December 3-4, 2016	Wellington, NZ
Ice and Fire Con	April 28-30, 2017	Pembroke, VA
Crossingcon	June 21-23, 2019	Montreal, Canada
2020s
Asimov Centennial Meetup	January 4, 2020	NY, NY
Reunicon 2020	August 20-22, 2021	The Hague, Netherlands
Tzarkon		St. Louis, MO
Celsius 232	July 19-23, 2022	Avilés, Spain
ReConnect	June 2-4, 2023	Aotearoa, New Zealand

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