Historically , most Worldcons were held in the USA ; however , beginning in the later part of the 20th century an increasing number of them have been hosted in other countries . In 2017 , the 75th World Science Fiction Convention ( " Worldcon 75 " ) was held in Helsinki , Finland ; the 2018 Worldcon was held in San Jose , California , and the 2019 Worldcon will be in Dublin . The 2020 Worldcon will be in New Zealand
75th World Science Fiction Convention
75th World Science Fiction Convention
Worldcon