Jack William Kelso (January 23, 1934 – October 2, 1952) was a United States Marine who posthumously received the Medal of Honor for his actions on the night of October 2, 1952, during the First Battle of the Hook in the Korean War. He was killed while covering the escape of fellow Marines from a besieged bunker. He was the 31st Marine to receive the United States's highest military decoration for valor during the Korean War.