Koos de Jong

Jacobus Hermanus Hendrik Jan "Koos" de Jong (7 April 1912 – 20 August 1993) was a sailor from the Netherlands. He competed in the Firefly event at the 1948 Olympics and in the Finn event at the 1952 Games and won a bronze medal in 1948, placing fourth in 1952. De Jong won several medals at European championships, including the gold in 1959.