Onesie Conventions

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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[1] 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 Hampton, VA
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
  1. A second iteration was planned for 1968 but cancelled at the last minute.

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