Olympic Betting: Who Will Host 2016 Summer Games?by Allen James | October 1st, 2009 Chicago will host the 2016 Summer Games if Barack Obama has anything to do with it. (AP Images)The International Olympic Committee (IOC) will announce on Friday which city among Chicago, Rio de Janeiro, Tokyo or Madrid will host the 2016 Summer Olympics.It's expected to be a very close ballot this time around. The winning candidate requires more than 50 percent of the votes cast in a secret electronic ballot.