The winners , across four experience-based categories , were : Workmanship awards : Presentation awards : Workmanship awards : Presentation awards : Workmanship awards : Presentation awards : Four committees announced bids to host the 75th World Science Fiction Convention and filed all of the required paperwork by the February 2015 deadline : " Nippon in 2017 " , " Montreal in 2017 " , " Helsinki in 2017 " , and " Washington D.C. in 2017 " . The 2017 site selected by the voters was announced during the convention 's third World Science Fiction Society business meeting , on Saturday , August 22 , 2015 . With 1363 votes out of 2625 valid ballots , Helsinki won on the first ballot and will operate as " Worldcon 75 " . DC17 ran second with 878 votes , Montreal third with 228 , and Nippon fourth with 120
75th World Science Fiction Convention
75th World Science Fiction Convention
73rd World Science Fiction Convention