Jacques Keyser (12 October 1885 – 21 March 1954) was a middle-distance runner. Born in Paris, he was the son of a Dutch father and Belgian mother, and could compete for both France and the Netherlands. Keyser took part in the

International Cross Country Championships The International Cross Country Championships was an annual international competition in cross country running. It was created in 1903 by the International Cross Country Union (ICCU) and it marked the first time that an annual international champ ...

in 1907 and 1911–1913 and won individual and team medals in 1913; his teams placed fourth in other three championships. He competed for the Netherlands at the

1908 Summer Olympics The 1908 Summer Olympics (officially the Games of the IV Olympiad and also known as London 1908) were an International sport, international multi-sport event held in London, England, United Kingdom, from 27 April to 31 October 1908. Th ...

, but failed to reach the finals of the

1500 m The 1500 metres or 1,500-metre run (typically pronounced 'fifteen-hundred metres') is the foremost middle distance track event in athletics. The distance has been contested at the Summer Olympics since 1896 and the World Championships in Athle ...

and 5 mile races. Between 1910 and 1912 he broke the Dutch national records on the 1500 m (4.11,8), the mile (4.31,4), and the 5000 m (16.10,2), each remaining a record for over a decade.

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