Qu Yun (; born June 5, 1978 in Hangzhou, Zhejiang) is a former butterfly stroke swimmer from China. In 1993, she broke the Asian Record in women's 200m butterfly at 2:08.53 in the Chinese National Games, which ranked number 1 in the world in 1993. She also won silver in the 100 m butterfly at 59.27, which ranked number 2 in the world. She competed in 1994 World Aquatics Championships and won silver medals in women's 100 m (59.69) and 200 m butterfly (2:07.40). She finished behind her compatriot, Liu Limin, in both races. The time in 200 m butterfly was her career best. In October, 1994, she set career best in women's 100 m butterfly (58.70) in Asian Games to win silver medal behind Liu Limin. In 1996, she won the Olympic trial in April with a time of 2:09.66 in 200 m butterfly over Liu Limin, and she competed in women's 200 m butterfly at the 1996 Summer Olympics and placed 4th. In 1997, Qu made a comeback and scored a double win (100 butterfly in 59.36 and 200 m butterfly in 2:08.10) in Chinese national Games. Her time in the 200 m butterfly ranked number 2 in the world behind Susan O'Neill. In January, 1998, she competed in the women's 200 m butterfly in 1998 World Aquatics Championships and finished 5th (2:10.49). This was her last appearance in major competition. She retired after the 2001 Chinese National Games.