Chicon is the name given to seven Worldcons and retroactively applied to an eighth Worldcon. All eight of the conventions were held in Chicago, Illinois.Chicon I, 1940 TASFIC, 1952 Chicon III, 1962 Chicon IV, 1982 Chicon V, 1991 Chicon 2000, 2000 Chicon 7, 2012 Chicon 8, 2022