The 1956 Summer Olympics, officially known as the Games of the XVI Olympiad, were an international multi-sport event which was held in Melbourne, Victoria, Australia, in 1956, apart from the equestrian events, which were held five months earlier in , Sweden. The 1956 Games were the first to be staged in the Southern Hemisphere and Oceania, as well as the first to be held outside Europe and North America. Melbourne is the southernmost city to host the games. Equestrian events could not be held in Australia due to quarantine regulations. This was the second Olympics not to be held entirely in one country, the first being the 1920 Summer Olympics, which Antwerp, Belgium, co-hosted with Amsterdam and Ostend.

Melbourne was selected as the host city over bids from Buenos Aires, Mexico City, Montreal and six American cities on 28 April 1949, at the 43rd IOC Session in Rome, Italy.

Many members of the IOC were sceptical about Melbourne as an appropriate site. Its location in the Southern Hemisphere was a major concern, since the reversal of seasons would mean the Games were held during the northern winter. This was thought likely to inconvenience athletes from the Northern Hemisphere, who were accustomed to resting during their winter.

Notwithstanding these concerns, the field of candidates eventually narrowed to two Southern Hemisphere cities, these being Melbourne and Buenos Aires, Argentina. Melbourne was selected, in 1949, to host the 1956 Olympics by a one-vote margin. The first sign of trouble was the revelation that Australian equine quarantine would prevent the country from hosting the equestrian events. Stockholm was selected as the alternative site, so equestrian competition began on 10 June, five and a half months before the rest of the Olympic Games were to open, half a world away.

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