Jason Jung (Chinese: 莊吉生; pinyin: Zhuāng Jíshēng; Pe̍h-ōe-jī: Chng Kit-seng; Taiwanese Mandarin: [tswáŋ tɕǐ sə́ŋ]; born 15 June 1989) is an American-born professional tennis player who represents Taiwan. He is a University of Michigan alumnus who has cracked the Top 150 in the ATP rankings and also won four ATP Challenger events.