The Summer Olympics are the world's largest multi-sport event, and are organized by the International Olympic Committee (IOC) every four years. Selection of the host city is done at an IOC Session four to seven years prior to the tournament, in which the IOC members vote between candidate cities which have submitted bids. As of the selection of the 2016 Summer Olympics, 28 games have been held in 23 cities in 19 countries. Bids have been made by 64 cities in 34 countries.
By year
The following is a list of bids for the Summer Olympics. It consists of the year the games were held or scheduled to be held, the date the decision was made, the city and country which issued the bid, the votes at the IOC Session for each voting round, and the ultimate host of the games. The bid listed first for each games is the one selected by the IOC, whether or not it ultimately hosted the games. ==By city==
By city
The following is a list of cities' bids. It lists the country, city, and year for which failed, withdrawn, and successful bids were submitted. Parentheses indicate that the city was awarded the games without a bidding process. A dagger () indicates that the city was awarded the games, but that they were ultimately not held in the city, because the games were either canceled or moved. An asterisk (*) indicates that the bid was not shortlisted. A double asterisk (**) indicates that the bid was withdrawn. ==By country==
By country
The following is a list of bids submitted by each national Olympic committee, listing the country and years it bid. Only countries that have submitted bids from multiple cities are included. Successful bids are in boldface. A parenthesis indicates that the city was awarded the games without a bidding process. A dagger () indicates that the city was awarded the games, but that they were ultimately not held in the city, either because the games were cancelled or moved. == See also ==