Jonathon Marshall

Jonathon Marshall (born 15 November 2004 in Akron, Ohio) is an English swimmer of American descent. He has a dual citizenship with United States and Great Britain

Career
Marshall won a four medals at 2022 European Junior Swimming Championships, a gold in the 4 × 100 m medley relay, a silver in the 50 m backstroke, a bronze in the 100 m backstroke and a mixed relay silver. He also made his senior debut for Great Britain in 2022 at the 2022 European Aquatics Championships.

In 2024, Marshall finished second in the 100 metres backstroke at the 2024 Aquatics GB Swimming Championships. His time of 53.03 seconds, behind Oliver Morgan (who won the event in a national record) was fast enough to meet the British consideration criteria for a place at the 2024 Summer Olympics. He was subsequently named in the British team for the Olympics.