Saudi Arabia competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's tenth appearance at the Olympics, except the 1980 Summer Olympics in Moscow, because of its partial support to the United States boycott.

Qatar competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012. The country's participation at London marked its eighth appearance in the Summer Olympics since its début at the 1984 Summer Olympics. The delegation sent by the Qatar Olympic Committee consisted of twelve athletes in athletics, shooting, swimming and table tennis. The 2012 Games marked the first time Qatar sent female athletes to the Olympic Games; following the 2008 Summer Olympics, it had been one of only three countries, along with Saudi Arabia and Brunei, to never have done so.