Tammi Piermarini (born May 2, 1967 in Newburyport, Massachusetts) is an American thoroughbred horse racing jockey. Piermarini began riding at Suffolk Downs in East Boston, Massachusetts in 1985, under her maiden name, Tammi Campbell. She finished fourth in her first race and won her second aboard Go Darby And Joan on August 30, 1985. In 2012, she became the third-leading female rider of all time, with 2,139 career wins. Through 2018, Piermarini has won 2,506 races. Continuing her success, in 2014, Piermarini was inducted into the New England Hall of Fame.