Frank Kent Foss (May 9, 1895 – April 5, 1989) was an American athlete who competed in the men's pole vault. He competed at the 1920 Summer Olympics and won gold, beating Danish pole vaulter Henry Petersen. Foss set a world record in winning the event with a height of 4.09 m (13 ft 5 in). After clinching the victory with a height of 13 feet, 3 and 5/6 inches, he made the new record height on his third attempt. He had already entered the Olympics as the world record holder at 4.05 m (13 ft 31⁄4 in).
Foss graduated from Cornell University in 1917, where he was also a member of the Quill and Dagger society. He was the IC4A Champion in 1916 after tying for the first the year before. He was the AAU champion in 1919 and 1920.