The United Kingdom of Great Britain and Northern Ireland, referred to as simply "Great Britain", has been represented at every modern Olympic Games. As of the 2024 Summer Olympics, it is third in the all-time Summer Olympic medal table by overall number of medals, and fourth in number of gold medals won. London hosted the Summer Olympic Games in 1908, 1948 and 2012.
Athletes from the United Kingdom compete as part of the Great Britain and Northern Ireland Olympic Team, branded "Team GB". The team is organised by the British Olympic Association, the National Olympic Committee for the UK. Team GB also represents the United Kingdom's Overseas Territories (with the exceptions of Bermuda, the British Virgin Islands, and the Cayman Islands), and the three Crown Dependencies of Guernsey, Jersey, and the Isle of Man. Athletes from Northern Ireland can choose to compete for either Great Britain or Ireland, with most choosing Ireland. The use of "Great Britain" over "United Kingdom" has faced criticism in Northern Ireland.