Brazil
The 2016 Olympic hosts are announced at the 2010 Olympic ceremonies in Vancouver.
Brazil 2016
2016.
Rio de Janeiro, Brazil
Glasgow, Scotland
Cities, not countries, (though of course the country will have an input) bid to host the Olympic games, usually 8 - 12 years in advance. The International Olympic Commitee will then consider each bid and decide where the game will be held in a particular year. The commitee awarded the 2016 game to Rio
Spain.
The next scheduled Summer Olympic game will be held in the summer of 2016. The host of the Summer 2016 Olympic will be Rio, Brazil.
Chicago has never hosted the Olympic Games. The city bid for the Summer Olympics multiple times, most notably for the 2016 Games, but ultimately lost to Rio de Janeiro. Prior to that, Chicago was also a contender for the 1904 and 2012 Olympics, but these bids were not successful either. Despite its efforts, Chicago remains without an Olympic hosting history.
Moscow 1980.
Beijing, China 2008