Jonathan Tiomkin (known as "Jon"; born July 12, 1979, in Brooklyn, New York) is an American Olympic foil fencer.
Tiomkin began fencing when he was a freshman at Hewlett High School in Hewlett, New York.
Fencing for St. John's University, Tiomkin won the bronze medal in foil at the 1999 NCAA Championships, and was a 1st-team All-American. In 2001 he came in 6th. He won the silver medal in 2002.
Tiomkin won that national title in foil in 1999 and 2003, and placed second in 2004.
At the 2003 Pan American Games, he won a gold medal in the team foil event and silver in individual foil.
His individual results at the World Fencing Championships were 64th at the 2001 World Fencing Championships and 2003 World Fencing Championships, 52nd at the 2002 World Fencing Championships, and 45th at the 2006 World Fencing Championships. His best team result was 9th in 2003.
Tiomkin won the bronze medal in the 2005 Shanghai World Cup.
At the 2004 Summer Olympics, Tiomkin advanced to the round of 32, where he was defeated 3âÂÂ15 by the number 1 seed, Andrea Cassaràof Italy. In the team foil event, the US team reached the semifinals, and finished in 4th place.
Tiomkin, who is Jewish, fenced in the 2001 Maccabiah Games, winning team silver medals in épée and foil.