Worldcon/List of worldcons

This is a list of the World Science Fiction Conventions held so far. Unless otherwise noted, the conventions have been held in the U.S..

1. 1939: Nycon I (New York)
2. 1940: Chicon I (Chicago)
3. 1941: Denvention I (Denver?)
4. 1946: Pacificon I (Los Angeles)
5. 1947: Philcon I (Philadelphia)
6. 1948: Torcon I (Toronto, Canada)
7. 1949: Cinvension (Cincinnati)
8. 1950: NorWesCon? (Portland)
9. 1951: Nolacon I (New Orleans)
10. 1952: TASFiC? (Chicago)
11. 1953: 11th Worldcon (Philadelphia)
12. 1954: SFCon (San Francisco)
13. 1955: Clevention (Cleveland?)
14. 1956: NewYorCon? (New York)
15. 1957: Loncon I (London, England)
16. 1958: Solacon ([South Gate]?)
17. 1959: Detention (Detroit)
18. 1960: Pittcon (Pittsburgh)
19. 1961: Seacon (Seattle)
20. 1962: Chicon II (Chicago)
21. 1963: Discon I (Washington DC)
22. 1964: Pacificon II (Oakland)
23. 1965: Loncon II (London, England)
24. 1966: Tricon (Cleveland?)
25. 1967: Nycon III (New York)
26. 1968: Baycon (Oakland)
27. 1969: St. Louiscon (St. Louis)
28. 1970: Heicon '70 (Heidelberg?, West Germany)
29. 1971: Noreascon I (Boston)
30. 1972: LACon I (Los Angeles)
31. 1973: Torcon II (Toronto, Canada)
32. 1974: Discon II (Washington DC)
33. 1975: Aussiecon One (Melbourne, Australia)