Helsinki was the 2017 Worldcon, officially called "Worldcon 75", held August 9-13, 2017 at the Helsinki Exhibition and Convention Centre in Helsinki, Finland. The GoHs were John-Henri Holmberg, Nalo Hopkinson, Johanna Sinisalo, Claire Wendling (did not attend due to illness), Walter Jon Williams, and Science Guest Ian Stewart.

It was selected at Loncon 3. The bidders were Helsinki in 2017, Montreal in 2017, Nippon in 2017, and DC17, see 2017 Site Selection Results for details.

Initially chaired by Jukka Halme, Saija Aro, and Crystal Huff, Aro resigned in May 2016 and Huff in November.

Its website is

It conducted site selection for the 2019 Worldcon, see 2019 Site Selection results.

A late surge in membership caused overcrowding problems in the programme rooms on the first day, forcing the committee to close membership sales for subsequent days, the first time this has happened for a Worldcon. Some extra programme space was made available later in the con, but the queues snaking round and round the conference space remained for the whole event, and most items continued to be turn people away.

The guerrilla newsletter was called OffPiste

30 videos of programme items

MidAmeriCon II«« »»Worldcon 76

File nameFile typeSize
Offpiste.pdfPDF document4.83 MBInfo

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