Jozef Koščak (born Jozef Koscsak, also commonly written as Josef Koščák; 8 June 1903 – 10 January 1979) was a Slovak long-distance runner, representing Czechoslovakia. He competed in the men's 5000 metres at the 1928 Summer Olympics. He was the most successful long-distance runner in Czechoslovakia until 1939.
In the 1950s, Koščak was imprisoned for five years on false charges of treason and espionage; he was eventually cleared of all charges.
International competitions Representing 1928 Olympic Games Amsterdam, Netherlands 8th (sf 2) 5000m 15:42.0 1934 European Championships Turin, Italy 13th 5000m 16:10.0
National titles Czechoslovak Athletics Championships 1924 Prague: (5000 m, 16:32.6) 1924 Prague: (10 000 m, 35:15.4) 1925 Prague: (5000 m, 16:32.2) 1925 Prague: (10 000 m, 34:22.0) 1927 Brno: (5000 m, 16:19.2) 1927 Brno: (10 000 m, 34:34.6) 1928 Prague: (5000 m, 15:39.3) 1929 Prague: (High jump, 188 cm NR)
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