The 1948 Summer Olympics were an international multi-sport event held from 29 July to 14 August 1948 in London, United Kingdom. Following a twelve-year hiatus caused by the outbreak of World War II, these were the first Summer Olympics held since the 1936 Games in Berlin. The 1940 Olympic Games had been scheduled for Tokyo and then for Helsinki, while the 1944 Olympic Games had been provisionally planned for London. This was the second time London had hosted the Olympic Games, having previously hosted them in 1908, forty years earlier. The Olympics would again return to London 64 years later in 2012, making London the first city to have hosted the games three times, and the only such city until Paris and Los Angeles host their third games in 2024 and 2028, respectively. The 1948 Olympic Games were also the first of two summer Games held under the IOC presidency of Sigfrid Edström.
Finland competed at the 1948 Summer Olympics in London, England. 129 competitors, 123 men and 6 women, took part in 84 events in 16 sports. As the country hosted the next Olympics in Helsinki, a Finnish segment was performed at the closing ceremony.
The women's 200 metre breaststroke event, included in the swimming competition at the 1948 Summer Olympics, took place from 30 July to 3 August at the Empire Pool. In this event, swimmers covered four lengths of the 50-metre (160 ft) Olympic-sized pool employing the breaststroke. It was the fifth appearance of the event, which first appeared at the 1924 Summer Olympics in Paris. It was also the first appearance of the event since the outbreak of World War II. A total of 22 competitors from 14 nations participated in the event.
The men's 100 metres sprint event at the 1948 Olympic Games in London, England, we held at Wembley Stadium on 30 and 31 July. Sixty-three athletes from 33 nations competed; each nation was limited to 3 runners by rules set at the 1930 Olympic Congress. The final was won by American Harrison Dillard, in a photo finish. Lloyd LaBeach of Panama won his nation's first medal in the men's 100 metres, a bronze. This was the first time a photo finish camera was used at an Olympic Games. The photo finish equipment consisted of a photoelectric cell, called the Magic Eye, produced by Swiss watchmaker Omega and a slit photography camera produced by the British Race Finish Recording Company.
The men's 200 metres sprint event at the 1948 Summer Olympics took place between 2 August and 3 August. There were 51 competitors from 28 nations. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by American Mel Patton. His countryman Barney Ewell earned silver, making this the third consecutive Games the United States took the top two spots in the event. Lloyd La Beach's bronze gave Panama a medal in its debut in the event.
The men's 400 metres sprint event at the 1948 Olympic Games took place between August 4 and August 5. Fifty-three athletes from 28 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by Jamaican Arthur Wint coming from almost 10 meters back to catch teammate and world record holder Herb McKenley. This was Jamaica's first Olympic gold medal in any event, and broke a string of 3 straight American victories in the men's 400 metres.
The men's 800 metres event at the 1948 Olympic Games took place July 30, July 31 and August 2. Forty-one athletes from 24 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by the American Mal Whitfield. It was the first of Whitfield's two wins in the event, the second of four consecutive American victories, and the fifth overall United States win in the 800 metres. Arthur Wint earned Jamaica's first Olympic medal in any event with silver; he would take gold in the 400 metres a few days later. Marcel Hansenne took France's first 800 metres medal with bronze.
The men's 1500 metres event at the 1948 Olympic Games took place August 4 and August 6. Thirty-six athletes from 22 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by Swede Henry Eriksson. It was Sweden's first medal in the 1500 metres; Lennart Strand took Sweden's second medal 0.6 seconds later. Willem Slijkhuis earned bronze, with the Netherlands also receiving its first medal in the 1500 metres.
The men's 5000 metres event at the 1948 Olympic Games took place July 31 and August 2. The final was won by Gaston Reiff of Belgium.
The men's 110 metres hurdles event at the 1948 Summer Olympic Games took place on 3 and 4 August. Twenty-eight athletes from 18 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by American William Porter. Porter's compatriots, Clyde Scott and Craig Dixon took 2nd and 3rd place. It was the third of nine consecutive American victories, and the ninth overall gold medal for the United States in the 110 metres hurdles. It was also the first of four consecutive American podium sweeps, and the fifth overall sweep by the United States in the event.
The men's 3000 metres steeplechase event at the 1948 Summer Olympic Games took place on 3 and 5 August. The final was won by Swede Tore Sjöstrand. Sjöstrand's compatriots, Erik Elmsäter and Göte Hagström took 2nd and 3rd place.
The men's 4 × 400 metres relay event at the 1948 Olympic Games took place on 6 and 7 August. The United States team won the final with a time of 3:10.4.
The men's 10 kilometres walk event at the 1948 Summer Olympic Games took place from 3 to 7 August. The final was won by Swede John Mikaelsson. This was the first time since 1924 the event took place.
The women's 100 metres sprint event at the 1948 Olympic Games took place July 31 and August 2. The final was won by Dutchwoman Fanny Blankers-Koen.
The women's 200 metres sprint event at the 1948 Olympic Games took place on August 5 and August 6. The final was won by Dutch athlete Fanny Blankers-Koen. It was the first time this event was included in the Summer Olympics.
The women's 80 metres hurdles event at the 1948 Summer Olympic Games took place on 3 and 4 August. The final was won by Dutch athlete Fanny Blankers-Koen.
The women's 4 × 100 metres relay event at the 1948 Olympic Games took place on August 7. The Dutch team won with a time of 47.5.
The men's tandem cycling event at the 1948 Summer Olympics took place between 7 and 11 August and was one of six events at the 1948 Olympics.
The men's team pursuit cycling event at the 1948 Summer Olympics took place on 7 to 9 August and was one of six events at the 1948 Olympics.
The men's double sculls competition at the 1948 Summer Olympics in London took place are at Henley Royal Regatta Course on the Henley-on-Thames.
