John Valentine Sigmund (born 25 February 1910 in St. Louis, Missouri, died on 5 April 1979 of a heart attack) is an American marathon swimmer who was inducted in the International Marathon Swimming Hall of Fame as an Honor Swimmer in 1965.
Open Water Swimming Highlights
- In 1938, he completed a 23-mile (37 km) river swim in the Mississippi River from Alton, Illinois to St. Louis, Missouri in 5 hours 9 minutes.
- In 1939, he set a record for swimming 37 km in the Mississippi River from Alton, Illinois to St. Louis, Missouri with his hands tied behind his back, in more than 6 hours.
- On 4 July 1939, he reswam the 37 km course in the Mississippi River from Alton, Illinois to St. Louis, Missouri in 5 hours 1 minute to break the record to win a US$200 bet offered by Walter Jerger.
- In on 25 July 1940 at the age of 30, he swam 470 km (292 miles) down the Mississippi River from St. Louis to Caruthersville, Missouri in 89 hours 46 minutes to join the 24-Hour Club. He broke Clarence Giles' mark of 288 miles (463.4 km) set in July 1939 from Billings to Glendive in 77 hours 30 minutes down the Yellowstone River.
- John Valentine Sigmund, 1910–1979
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