London 's bid to host the Worldcon was formally unopposed and won in balloting among the members of the 70th World Science Fiction Convention held in Chicago , Illinois , in 2012 . With 932 ballots cast , the voting breakdown was 864 votes for London , 29 ballots expressed no preference , and there were 39 write-in votes for various sites , including " Peggy Rae 's House " , Phoenix , Stockholm , and Tonopah , Nevada
70th World Science Fiction Convention
70th World Science Fiction Convention
72nd World Science Fiction Convention