Chicago's bid to host the Worldcon was formally unopposed and won in balloting among the members of the 68th World Science Fiction Convention held in Melbourne, Australia, in 2010. With only 526 ballots cast, this election had the lowest turnout since voting records began to be kept in 1974. The voting breakdown was 447 votes for Chicago, 20 ballots expressed no preference, and there were 59 write-in votes for various sites.
