Johan Leopold Stumpf (May 19, 1880 – August 24, 1944) was a Norwegian gymnast who competed in the 1906 Summer Olympics.
in Athens, Greece.Johan Leopold Stumpf was born at Kristiansand in Vest-Agder, Norway.
He was the son of Ladislav Leopold Stumpf (1856-1944) and Amalie Gudine Olausdatter
(1851-1927).
He competed as a member of the Kristiansands Turnforening gymnastics club.
In 1906, he won the gold medal as a member of the Norwegian gymnastics team in the Gymnastics Team Combined Exercises at the Intercalated Olympic Games.