John David Magrath (July 4, 1924 – April 14, 1945) was a soldier in the U.S. Army who posthumously received the Medal of Honor for his heroic actions and sacrifice of life during World War II for actions occurring in Italy on April 14, 1945. He served in the 10th Mountain Division. The Shea-Magrath Sports Complex at Norwalk High School in Connecticut is named for him. In June 1995, Fort Drum, New York renamed its Soldiers Sports Complex the Magrath Sports Complex. A plaque and portrait are in display Magrath Gym to honor his memory. In August 2013 the dedication of a monument and plaque in his honor was placed at the location of the battle by residents of Castel d'Aiano.

Magrath was born in the East Norwalk section of Norwalk, Connecticut on July 4, 1924. He enlisted in the Army from East Norwalk in March 1943. He was killed in action in Italy at age 20.

PFC John D. Magrath is the first Medal of Honor recipient of the 10th Mountain Division.