Arthur St. Clair Lyon (August 1, 1876 – June 13, 1952) was an American fencer.

[1] He won a bronze medal in the team foil event at the 1920 Summer Olympics.

[2][3] He died at Saint John's Hospital in Santa Monica, California on June 13, 1952, and was buried at Warwick Cemetery in Warwick, New York.

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