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
Beercon	September 5–6, 1948	Milwaukee
DeCon	December 28–29, 1948	Detroit
Hydracon	July 1-3, 1950	NY, NY
NECON	October 14, 1951	Bradford, UK
Buffalocon	May 2-4, 1952	Buffalo, NY
Riverina Conference	8-9 August 1953	Albury, Australia
Wiscon	September 20, 1953	Fond Du Lac, WI?
Medcon	November 7, 1953	Medway, UK
X-Con	April 10, 1954	San Francisco
Canberra Science Fiction Conference	March 30-April 1, 1956	Canberra, Australia
Eastercon-DAG	April 1, 1956	Fond du Lac, WI
Relaxacon	April 7-9, 1956	Carmel Valley, CA
IllWisCon	July 4-6, 1958	Chicago
Nullcon	August 1956	NY, NY
Forry-FortyTwo Con	November 21-23, 1958	LA, CA
Fanarcon	December 26-28, 1958	NY, NY
Nevadacon	August 26-27, 1959	Boulder City, NV
London Symposium	October 3, 1959	London, UK
Consolacon	September 1-4, 1961	New Orleans
KingCon	1967	Kingston, ON
Melbourne Science Fiction Conference	April 12-14, 1968	Melbourne, Australia
London Minicon	November 1968	London, UK
Conference on the Bibliography of Science Fiction	March 1, 1969	NY, NY
1969 Conference on Middle Earth	April 25-26, 1969	Urbana, IL
NEOSFS New Years Con	December 31, 1969 - January 1, 1970	Sandusky, OH
PresiCon	February 12-15, 1970	LA, CA
The Symposium	September 25-27, 1970	Long Beach, CA
Partycon	December 19-20, 1970	Dallas, TX
Mondo*Con	January 1971	NY, NY
Mini-Melcon	April 9-11 1971	Melbourne, Australia
BYO-Con	26-28 December 1972	Melbourne, Australia
Novacon (MI)	1973	Michigan
SUNYcon	April 14, 1973	Sony Brook, NY
Cal Tech Conference	March 8-9, 1974	Pasadena, CA
Medievalcon	May 25-27, 1974	Santa Barbara, CA
SF Symposium	October 22-25, 1974	Fort Collins, CO
Infinity 74	November 29-December 1, 1974	NY, NY
No Con	1975	New Orleans, LA
Hopcon	March 7-9, 1975	Baltimore, MD
Palm Beach Con	August 30-September 1, 1975	Palm Beach, FL
Columbicon	August 8-10, 1975	Columbia, MD
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
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.
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, Canada
Hippotocon	August 12-14, 1977	Homewood, IL
Great Combined Milford and Clarion Decennial Jubilee, Colloquim 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
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
Un-Con	September 9, 1978	Winnipeg, MB
UnreelCon	October 27-29, 1978	Toronto
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
SF and Space Expo	October 6-8, 1979	San Francisco, CA
Novacon 9 West	November 2-4, 1979	Albany, NY
KulaCon	November 30-December 2, 1979	Vancouver, BC
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
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
ZerCon	November, 1981	Huntsville, AL
Augacon	November 27-29, 1981	San Mateo, CA
Smoffcon 1	23-25 January 1982	Melbourne, Australia
CONgestion	19-21 March, 1982	Oklahoma City, OK
LEXICON	28-31 May 1982	Leicester, UK
Summercon 82	July 2-4, 1982	Elmhurst, NY
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
R-Con	November 2-4, 1984	Rochester, NY
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
Brave New Con	January 13-15, 1984	Reston, VA
Wamcon	February 15-17, 1984
Petuniacon	April 20-22, 1984	Oakland, CA
Onocon '84	May 4-6, 1984	Syracuse, NY
Con-Juration	June 1-3, 1984	Tulsa, OK
Concentric '84	November 2-4, 1984	Columbia, MO
LASFS 50th Anniversary Banquet	Fmeetup
November 3, 1984	LA, CA
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
Triangulum	August 30-September 1, 1985	Milwaukee, WI
XIIcon	September 26-29, 1986	Glasgow, Scotland
4E 2B 70	November 21, 1986	Los Angeles, CA
Conception	13-15 February 1987	Leeds, UK
No-No-Con	February 1988	Edmonton, AB
Conine	5-7 August 1988	Oxford, UK
Octoberfeast	14-15 October 1989	York, Australia
Imagine 90	1990	Rochester, NY
Victoricon	1991	Melbourne, Australia
NoSF3	1991	New Orleans, LA
CON/FUSION	February 16-18, 1991	San Diego, CA
Twentycon	July, 1991	Birmingham, UK
Rhino	July 12-14, 1991	London, ON
ConFictionary	September, 1991	Adelaide, Australia
Philip K. Dick Celebration	19-20 October 1991	Essex, UK
Altercon 666	November 8-10, 1991	London
German X-Con	December 27-30, 1991	Dusseldorf, Germany
The Contract	February 14, 1992	Adelaide, Australia
Haldecon	13 June 1992	Sydney, Australia
Farmertacon	August 8, 1992	Tampere, Finland
DraCon	October 24, 1992	Bristol, UK
Conyac	1993	Amsterdam, Netherlands
Continuity '93	February 12-14, 1993	Birmingham, AL
Hurricon	February 26-28, 1993	Fort Walton Beach, FL
Conflation	March 5-7, 1993	Clayton, 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
CupCon	October 29-31 1993	Melbourne, Australia
Sealcon	1994	Eindhoven, Netherlands
Misdemeanour	February 1994	Somerset, UK
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	May 27, 1995	Vancouver, BC
Attitude: The Convention	February 14-17, 1996	Malvern, UK
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
Reminiscon Fifty	February 9, 2002	Cardiff, Wales
Druncon 1	May 25-26, 2003	Peterborough
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
ValhallaCon	September 4-6, 2009	Bellingham, WA
Canberra Science Fiction Convention	May 5-6, 2011	Canberra, Australia
VillainCon	October 1-2, 2011	Perth, Australia
Return of the Ring	16-20 August, 2012	Loughborough University, England
Andromeda One	September 21, 2013	Birmingham, UK
JOFcon	March 28-30 2014	Baltimore, MD
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
Asimov Centennial Meetup	January 4, 2020	NY, NY
Reunicon 2020	August 20-22, 2021	The Hague, Netherlands

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This is a convention page. Please extend it by adding information about the convention, including dates, GoHs, convention chairman, locale, sponsoring organization, external links to convention pages, awards given, the program, notable events, anecdotes, pictures, scans of publications, pictures of T-shirts, con reports, etc.

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