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 |
|---|---|---|
| Minneapolis Thing | September 4-6, 1948 | Minneapolis |
| Beercon | September 5–6, 1948 | Milwaukee |
| DeCon | December 28–29, 1948 | Detroit |
| Norwescon | April 23, 1949 | Eugene, OR |
| Hydracon | July 1-3, 1950 | New York City |
| Lynnhavention | July 2–4, 1950 | Lynn Haven, Florida |
| NECON | October 14, 1951 | Bradford, UK |
| Buffalocon | May 2-4, 1952 | Buffalo, NY |
| HECon | May 1953 | Cleveland, OH |
| 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 | 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 |
| Bangcon | 1958 | Bangkok, Thailand |
| 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 |
| 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, Australia |
| 1968 Belknap College Tolkien Conference | October 1968 | Center Harbor, NH |
| 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 |
| Ratcon | 1973 | Adelaide |
| SUNYcon | April 14, 1973 | Stony Brook, NY |
| Beyond This Horizon | October 23-25, 1975 | Sunderland, UK |
| 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 1 | July 5-7 1974 | Marietta, GA |
| SF Symposium | October 22-25, 1974 | Fort Collins, CO |
| Arlington, VA | ||
| Infinity 74 | November 29-December 1, 1974 | NY, NY |
| No Con | 1975 | New Orleans, LA |
| Hopcon | March 7-9, 1975 | Baltimore, MD |
| Murphycon | April 11-13, 1975 | Albany, NY |
| 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 |
| 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. |
| Mudcon | May 8, 1977 | Stony Brook, NY |
| Orcon | Eugene, OR | |
| 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, 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 |
| Washington, DC | ||
| 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 |
| Prunecon | June 9-11, 1978 | Toronto, Canada |
| 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 |
| Louisville, KY | ||
| 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 |
| Tropicon | November 23-25, 1979 | Orlando, FL |
| 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 |
| Los Angeles, CA | ||
| Filkcon West | June 5-7, 1981 | Los Angeles, CA |
| Tolkon | August 21-24, 1981 | Sydney, Australia |
| Triciticon '81 | September 18-20, 1981 | Vestal, NY |
| Imagicon '81 | September 25-27, 1981 | Memphis, TN |
| 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 |
| Brandycon | June 18-20, 1982 | Claymont, DE |
| 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 |
| Capcon '84 | April 13-15, 1984 | Lubbock, TX |
| Pendulum | April 22-24, 1983 | Ottawa, ON, 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, ON, 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 '84 | 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 II | 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 |
| 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 |
| Context | November 27-29, 1987 | Houston, TX |
| 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 |
| 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 |
| Twentycon | July, 1991 | Birmingham, UK |
| Rhino | July 12-14, 1991 | London, ON |
| ConFictionary | September, 1991 | Adelaide, Australia |
| Soupçon | October 1991 | Jersey, UK |
| 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 |
| 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 |
| 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 |
| 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 |
| Interception | June 24-25, 1995 | Stevenage, UK |
| Aussiecon Reunion Convention | September 22-24, 1995 | Melbourne |
| 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 |
| 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 |
| Filky Days | June 8-10, 2001 | Leverkusen, Germany |
| Tucker Tribute | August 3–4, 2001 | Bloomington, IL |
| Reminiscon Fifty | February 9, 2002 | Cardiff, Wales |
| 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 |
| Cytricon V | October 2008 | Kettering, UK |
| ValhallaCon | September 4-6, 2009 | Bellingham, WA |
| ManorCon | August 13-15, 2010 | Somerset, UK |
| Canberra Science Fiction Convention | May 5-6, 2011 | Canberra, Australia |
| 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 |
| Asimov Centennial Meetup | January 4, 2020 | NY, NY |
| Reunicon 2020 | August 20-22, 2021 | The Hague, Netherlands |
| Tzarkon | St. Louis, MO |
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| 1947—2020 |
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