Xu Xin (simplified Chinese: 许昕; traditional Chinese: 許昕; pinyin: Xǔ Xīn; born 8 January 1990) is a Chinese professional table tennis player who is ranked world No. 2 for men's singles by the International Table Tennis Federation (ITTF), as of April 2020. He first reached his career-high singles ranking of world No. 1 in January 2013.
He has won 17 World Tour Singles titles and has won the World Championships in men's doubles thrice, mixed doubles twice, and five times in the team event. In addition, Xu Xin along with Ma Long and Zhang Jike won the men's team gold medal at the 2016 Summer Olympics in Rio de Janeiro.