Ou Yushan (Chinese: 欧钰珊, born 2004 in Guangxi, China) is a Chinese individual artistic gymnast. She is the 2019 world junior two-time silver and one-time bronze medalist (silver in the team event, bronze in the all-around, and silver on the floor).
In 2018, she debuted at the Chinese (senior) national championships, helping the Guangdong province team to the gold medals in the women's team and mixed team competitions.
In 2019, she again competed at the Chinese senior nationals. In the all-around, Ou's fall on the uneven bars sunk her chances for the all-around gold, pushing her down to fourth place at that point, but after performing well on the balance beam she finished in the bronze position. She also won three more individual medals (gold on the balance beam, silver on the floor behind Shang Chunsong and bronze on the uneven bars) and once again helped the Guandong province to win the women's team gold.
In August 2019, she won six golds, two silvers and two or three bronzes at the 2nd China National Youth Games.