Yani Tseng (born 23 January 1989) is a Taiwanese professional golfer currently playing on the U.S.-based LPGA Tour. She is the youngest player ever, male or female, to win five major championships and is currently ranked number 1 in the Women's World Golf Rankings.

Tseng was the top-ranked amateur in Taiwan from 2004 to 2006. The highlight of her amateur career was winning the 2004 U.S. Women's Amateur Public Links, defeating Michelle Wie in the final, 1 up. Her amateur accomplishments include:

Tseng turned professional in January 2007. That year she competed on the Ladies Asian Golf Tour and won the DLF Women’s Indian Open. She also competed on the CN Canadian Women’s Tour where she won the CN Canadian Women’s Tour at Vancouver Golf Club.