List of Worldcons List of Worldcons List of Worldcons

| blank | Year_ | Name_ | City | Country | Guests_of_Honor | Size_ |
|---|---|---|---|---|---|---|
| 24th | 1966 | Tricon | Cleveland, Ohio | United States | L. Sprague de Camp | 850 |
| 25th | 1967 | Nycon 3 | New York, New York | United States | Lester del Rey (pro) , Bob Tucker (fan) | 1500 |
| 26th | 1968 | Baycon | Berkeley, California | United States | Philip José Farmer (pro) , Walter J. Daugherty (fan) | 1430 |
| 27th | 1969 | St. Louiscon | St. Louis, Missouri | United States | Jack Gaughan (pro) , Eddie Jones (fan) | 1534 |
| 28th | 1970 | Heicon `70 | Heidelberg | West Germany | E.C. Tubb (UK) , Robert Silverberg (US) , Herbert W. Franke (Germany) , Elliot K. Shorter (fan) | 620 |
| 29th | 1971 | Noreascon I | Boston, Massachusetts | United States | Clifford D. Simak (pro) , Harry Warner, Jr. (fan) | 1600 |