Nam Sung-yong (November 23, 1912 – February 20, 2001) was a Korean Olympian who won a bronze medal in the marathon at the 1936 Summer Olympics, completing the run in 2 hours, 31 minutes, and 42 seconds.
He was born in Junten (Suncheon), Korea, Empire of Japan and received higher education in Japan. Like the gold medalist Sohn Kee-chung, Nam Sung-yong used the Japanese pronunciation of his name, Nan Shōryū<!-- () is NOT the on'yomi of the kanji 南昇龍, but a kana transcription approximating the Korean pronunciation of the hanja 南昇龍, so it makes little sense to use it to illustrate "Nan Shōryū" --> as Korea was then a part of the Japanese Empire.