Arthur John McCashin (5 May 1909 – 24 September 1988) was an American equestrian.

He won a bronze medal in team show jumping at the 1952 Olympics and placed 12th individually.

After retiring from competitions he became a riding course designer, and for many years planned the circuit at the New York's National Horse Show.

During World War II he served as a pilot in a supply service for the armed forces.

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