Lou Yun (Chinese: 楼云; pinyin: Lóu Yún; born June 23, 1964, in Hangzhou, Zhejiang) is a retired Chinese gymnast who competed in the 1984 and 1988 Summer Olympic Games, winning the vault twice.

Lou Yun began gymnastics training at the Hangzhou Sports School for Amateurs, and in the same year he also entered the provincial sports school of Zhejiang.

Known for his specialty in the vault, he won the 1987 World Championships in that event, in addition to his two gold medals.

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