Mary Caroline Pierce is a French former professional tennis player. She was ranked world No. 3 in singles and in doubles by the Women's Tennis Association (WTA). Pierce won 18 singles titles on the WTA Tour, including two majors at the 1995 Australian Open and the 2000 French Open, and five Tier I singles events. Pierce was a finalist at a further four singles majors, and twice at the Tour Finals.
In doubles, Pierce won 10 doubles titles on the WTA Tour, including two major titles at the 2000 French Open in women's doubles partnering Martina Hingis, and at the 2005 Wimbledon Championships in mixed doubles partnering Mahesh Bhupathi. She was also a runner-up in women's doubles at the 2000 Australian Open, partnering Hingis.
Pierce was inducted into the International Tennis Hall of Fame in 2019. She is the most recent Frenchwoman to win the French Open singles title.