List of Worldcons
This World Science Fiction Convention list includes prior and scheduled Worldcons. The data is maintained by the Long List Committee, a World Science Fiction Society sub-committee.
Notes:
- Name – a convention is normally listed by the least confusing version of its name. This is usually the name preferred by the convention, but fannish tradition is followed in retroactively numbering the first Worldcon in a series 1.
- Guests of honor – custom in designating guests of honor has varied greatly, with some conventions giving specific titles and some simply call them all guests of honor. Specific labels have been used where they existed, as have regional variants in spelling.
- Size – where available, this column records two numbers: how many paying members attended the Worldcon and how many total members there were. The available data is very incomplete and imprecise and many of these numbers are probably substantially in error.
- No Worldcons were held between 1942 and 1945 due to World War II.
| Year | Name | City | Country | Guests of honor | Size | |
| 1st | 1939 | Nycon I | New York, New York | US | Frank R. Paul | 200 |
| 2nd | 1940 | Chicon I | Chicago, Illinois | US | E. E. "Doc" Smith | 128 |
| 3rd | 1941 | Denvention I | Denver, Colorado | US | Robert A. Heinlein | 90 |
| 4th | 1946 | Pacificon I | Los Angeles, California | US | A. E. van Vogt E. Mayne Hull | 130 |
| 5th | 1947 | Philcon I | Philadelphia, Pennsylvania | US | John W. Campbell, Jr. | 200 |
| 6th | 1948 | Torcon I | Toronto, Ontario | Canada | Robert Bloch Bob Tucker | 200 |
| 7th | 1949 | Cinvention | Cincinnati, Ohio | US | Lloyd A. Eshbach Ted Carnell | 190 |
| 8th | 1950 | Norwescon | Portland, Oregon | US | Anthony Boucher | 400 |
| 9th | 1951 | Nolacon I | New Orleans, Louisiana | US | Fritz Leiber | 190 |
| 10th | 1952 | TASFiC | Chicago, Illinois | US | Hugo Gernsback | 870 |
| 11th | 1953 | Philcon II | Philadelphia, Pennsylvania | US | Willy Ley | 750 |
| 12th | 1954 | SFCon | San Francisco, California | US | John W. Campbell, Jr. | 700 |
| 13th | 1955 | Clevention | Cleveland, Ohio | US | Isaac Asimov Sam Moskowitz | 380 |
| 14th | 1956 | NyCon II | New York, New York | US | Arthur C. Clarke | 850 |
| 15th | 1957 | Loncon I | London | UK | John W. Campbell, Jr. | 268 |
| 16th | 1958 | Solacon | South Gate, California | US | Richard Matheson | 211 |
| 17th | 1959 | Detention | Detroit, Michigan | US | Poul Anderson John Berry | 371 |
| 18th | 1960 | Pittcon | Pittsburgh, Pennsylvania | US | James Blish | 568 |
| 19th | 1961 | Seacon | Seattle, Washington | US | Robert A. Heinlein | 300 |
| 20th | 1962 | Chicon III | Chicago, Illinois | US | Theodore Sturgeon | 730 |
| 21st | 1963 | Discon I | Washington, D.C. | US | Murray Leinster | 600 |
| 22nd | 1964 | Pacificon II | Oakland, California | US | Leigh Brackett Edmond Hamilton Forrest J Ackerman | 523 |
| 23rd | 1965 | Loncon II | London | UK | Brian W. Aldiss | 350 |
| 24th | 1966 | Tricon | Cleveland, Ohio | US | L. Sprague de Camp | 850 |
| 25th | 1967 | Nycon 3 | New York, New York | US | Lester del Rey Bob Tucker | 1,500 |
| 26th | 1968 | Baycon | Berkeley, California | US | Philip José Farmer Walter J. Daugherty | 1,430 |
| 27th | 1969 | St. Louiscon | St. Louis, Missouri | US | Jack Gaughan Eddie Jones | 1,534 |
| 28th | 1970 | Heicon '70 | Heidelberg | West Germany | E.C. Tubb Robert Silverberg Herbert W. Franke Elliot K. Shorter | 620 |
| 29th | 1971 | Noreascon I | Boston, Massachusetts | US | Clifford D. Simak Harry Warner, Jr. | 1,600 |
| 30th | 1972 | L.A.con I | Los Angeles, California | US | Frederik Pohl Buck & Juanita Coulson | 2,007 |
| 31st | 1973 | Torcon II | Toronto, Ontario | Canada | Robert Bloch William Rotsler | 2,900 |
| 32nd | 1974 | Discon II | Washington, D.C. | US | Roger Zelazny Jay Kay Klein | 3,587 |
| 33rd | 1975 | Aussiecon 1 | Melbourne, Victoria | Australia | Ursula K. Le Guin Susan Wood Mike Glicksohn Donald Tuck | 606 |
| 34th | 1976 | MidAmeriCon | Kansas City, Missouri | US | Robert A. Heinlein George Barr | 3,014 |
| 35th | 1977 | SunCon | Miami Beach, Florida | US | Jack Williamson Robert A. Madle | 3,240 |
| 36th | 1978 | IguanaCon II | Phoenix, Arizona | US | Harlan Ellison Bill Bowers | 4,700 |
| 37th | 1979 | Seacon '79 | Brighton | UK | Brian Aldiss Fritz Leiber Harry Bell | 3,114 |
| 38th | 1980 | Noreascon Two | Boston, Massachusetts | US | Damon Knight Kate Wilhelm Bruce Pelz | 5,850 |
| 39th | 1981 | Denvention Two | Denver, Colorado | US | Clifford D. Simak C.L. Moore Rusty Hevelin | 3,792 |
| 40th | 1982 | Chicon IV | Chicago, Illinois | US | A. Bertram Chandler Frank Kelly Freas Lee Hoffman | 4,275 |
| 41st | 1983 | ConStellation | Baltimore, Maryland | US | John Brunner David A. Kyle | 6,400 |
| 42nd | 1984 | L.A.con II | Anaheim, California | US | Gordon R. Dickson Dick Eney | 8,365 |
| 43rd | 1985 | Aussiecon Two | Melbourne, Victoria | Australia | Gene Wolfe Ted White | 1,599 |
| 44th | 1986 | ConFederation | Atlanta, Georgia | US | Ray Bradbury Terry Carr | 5,811 |
| 45th | 1987 | Conspiracy '87 | Brighton | UK | Doris Lessing Alfred Bester Boris and Arkady Strugatsky Jim Burns Ray Harryhausen Joyce Slater and Ken Slater David Langford | 4,009 |
| 46th | 1988 | Nolacon II | New Orleans, Louisiana | US | Donald A. Wollheim Roger Sims | 5,300 |
| 47th | 1989 | Noreascon 3 | Boston, Massachusetts | US | Andre Norton Betty and Ian Ballantine The Stranger Club | 6,837 |
| 48th | 1990 | ConFiction | The Hague | Netherlands | Harry Harrison Wolfgang Jeschke Joe Haldeman Andrew I. Porter | 3,580 |
| 49th | 1991 | Chicon V | Chicago, Illinois | US | Hal Clement Martin H. Greenberg Richard Powers Jon and Joni Stopa | 5,661 |
| 50th | 1992 | MagiCon | Orlando, Florida | US | Jack Vance Vincent Di Fate Walter A. Willis | 5,319 |
| 51st | 1993 | ConFrancisco | San Francisco, California | US | Larry Niven Alicia Austin Tom Digby Jan Howard Finder Mark Twain | 6,602 |
| 52nd | 1994 | ConAdian | Winnipeg, Manitoba | Canada | Anne McCaffrey George Barr Robert Runte | 3,570 |
| 53rd | 1995 | Intersection | Glasgow, Scotland | UK | Samuel R. Delany Gerry Anderson Les Edwards Vin¢ Clarke | 4,173 |
| 54th | 1996 | L.A.con III | Anaheim, California | US | James White Roger Corman Elsie Wollheim Takumi and Sachiko Shibano | 6,703 |
| 55th | 1997 | LoneStarCon 2 | San Antonio, Texas | US | Algis Budrys Michael Moorcock Don Maitz Roy Tackett | 4,634 |
| 56th | 1998 | BucConeer | Baltimore, Maryland | US | C. J. Cherryh Milton A. Rothman Stanley Schmidt Michael Whelan J. Michael Straczynski | 6,572 |
| 57th | 1999 | Aussiecon Three | Melbourne, Victoria | Australia | Gregory Benford, author George Turner, author Bruce Gillespie, fan | 1,626 |
| 58th | 2000 | Chicon 2000 | Chicago, Illinois | US | Ben Bova Bob Eggleton Jim Baen Bob & Anne Passovoy | 5,794 |
| 59th | 2001 | Millennium Philcon | Philadelphia, Pennsylvania | US | Greg Bear Stephen Youll Gardner Dozois George H. Scithers | 4,840 |
| 60th | 2002 | ConJosé | San Jose, California | US | Vernor Vinge David Cherry Bjo & John Trimble Ferdinand Feghoot | 5,162 |
| 61st | 2003 | Torcon 3 | Toronto, Ontario | Canada | George R. R. Martin Frank Kelly Freas Mike Glyer Robert Bloch | 3,834 |
| 62nd | 2004 | Noreascon 4 | Boston, Massachusetts | US | Terry Pratchett William Tenn Jack Speer Peter Weston | 5,651 |
| 63rd | 2005 | Interaction | Glasgow, Scotland | UK | Greg Pickersgill Christopher Priest Robert Sheckley Lars-Olov Strandberg Jane Yolen | 4,115 |
| 64th | 2006 | L.A.con IV | Anaheim, California | US | Connie Willis James Gurney Howard DeVore Frankie Thomas | 5,738 |
| 65th | 2007 | Nippon 2007 | Yokohama | Japan | Sakyo Komatsu David Brin Takumi Shibano Yoshitaka Amano Michael Whelan | 3,348 |
| 66th | 2008 | Denvention 3 | Denver, Colorado | US | Lois McMaster Bujold Tom Whitmore Rick Sternbach | 3,752 |
| 67th | 2009 | Anticipation | Montréal, Québec | Canada | Neil Gaiman Elisabeth Vonarburg Taral Wayne David Hartwell Tom Doherty | 3,925 |
| 68th | 2010 | Aussiecon Four | Melbourne, Victoria | Australia | Kim Stanley Robinson Robin Johnson Shaun Tan | 2,101 |
| 69th | 2011 | Renovation | Reno, Nevada | US | Tim Powers Ellen Asher Boris Vallejo Charles N. Brown | 4,112 |
| 70th | 2012 | Chicon 7 | Chicago, Illinois | US | Mike Resnick Rowena Morrill Story Musgrave Peggy Rae Sapienza Jane Frank Sy Liebergot John Scalzi | 4,743 |
| 71st | 2013 | LoneStarCon 3 | San Antonio, Texas | US | Ellen Datlow James Gunn Willie Siros Norman Spinrad Darrell K. Sweet Paul Cornell Leslie Fish Joe R. Lansdale | 4,311 |
| 72nd | 2014 | Loncon 3 | London | UK | Iain M. Banks John Clute Chris Foss Malcolm Edwards Jeanne Gomoll Robin Hobb Bryan Talbot | 6,946 |
| 73rd | 2015 | Sasquan | Spokane, Washington | US | Brad Foster David Gerrold Vonda McIntyre Tom Smith Leslie Turek | 4,644 |
| 74th | 2016 | MidAmeriCon II | Kansas City, Missouri | US | Kinuko Y. Craft Patrick Nielsen Hayden Teresa Nielsen Hayden Tamora Pierce Michael Swanwick | 4,602 |
| 75th | 2017 | Worldcon 75 | Helsinki | Finland | John-Henri Holmberg Nalo Hopkinson Johanna Sinisalo Claire Wendling Walter Jon Williams | 5,944 |
| 76th | 2018 | Worldcon 76 in San Jose | San Jose, California | US | Spider Robinson Chelsea Quinn Yarbro Pierre Pettinger Sandy Pettinger Edgar Pangborn | 5,440 |
| 77th | 2019 | Dublin 2019 - An Irish Worldcon | Dublin | Ireland | Diane Duane Ginjer Buchanan Jocelyn Bell Burnell Ian McDonald Steve Jackson Bill and Mary Burns | 6,525 |
| 78th | 2020 | CoNZealand | Wellington | New Zealand | Mercedes Lackey Larry Dixon Greg Broadmore Rose Mitchell | |
| 79th | 2021 | DisCon III | Washington, D.C. | US | Nancy Kress Malka Older Toni Weisskopf Sheree Renee Thomas Ben Yalow |