Susan Polgar (born April 19, 1969, as Polgár Zsuzsanna and often known as Zsuzsa Polgár) is a Hungarian-American chess Grandmaster. She is an Olympic chess champion, a chess teacher, coach, writer and promoter and the head of the Susan Polgar Institute for Chess Excellence (SPICE) at Texas Tech University as well as the coach for the 2011 National Championship college chess team. She is the oldest of the famous "Polgár sisters": Zsuzsa, Zsófia, and Judit. Susan is perhaps most famous for being a child prodigy at chess, for being the first female to earn the Grandmaster title through tournament play, and for breaking a number of gender barriers in chess.

On the July 1984 FIDE Rating List, at the age of 15, she became the top ranked woman player in the world, and remained ranked in the top three for the next 23 years. She was also the first woman in history to break the gender barrier by qualifying for the 1986 "Men's" World Championship. She was the Women's World Chess Champion from 1996 to 1999. In October 2005 Polgar had an Elo rating of 2577, making her the second-ranked woman in the world at the time, after her sister Judit Polgár. Polgar went on to win ten Olympic medals (5 Gold, 4 Silver and 1 Bronze) and four Women's World Championships. She has not played in official competition since 2006.