Carson Branstine (born September 9, 2000 in Irvine, California, United States) is an American-Canadian tennis player. She reached a career-high WTA singles ranking of No. 468 on July 29, 2019 and a career-high WTA doubles ranking of No. 203 on September 18, 2017.
Branstine represented the United States from 2014 to February 2017, but started representing Canada, the birth country of her mother, in March 2017. She won the 2017 Australian Open and French Open junior doubles titles with Bianca Andreescu. In her first tournament as a Canadian, the ITF G1 in Carson, she went on to win both the singles and doubles titles. Also in 2017 at the Coupe Banque Nationale, she advanced, with compatriot Andreescu, to her first WTA doubles final where they were defeated by the first seeds Tímea Babos and Andrea Hlaváčková. In 2018, she won her first professional doubles title with Andreescu at the ITF 25K in Gatineau. In 2019, Branstine reached her first professional singles title, losing to Elizabeth Mandlik at the ITF 15K in Carson, United States. Also in 2019 at the 25K Challenger de Gatineau, she advanced to her second professional singles title where she was defeated by compatriot Leylah Annie Fernandez. In 2021, she won her first pro singles title at the ITF 15K in Cairo, defeating Priska Madelyn Nugroho in the final. She was a part of the University of Southern California tennis team for the 2019–20 season and transferred to the University of Virginia. She is currently playing for the Texas A&M University. In 2023, she won two singles titles and one doubles title at ITF 15Ks in Monastir.
Branstine was born in Irvine, California to an American father, Bruce, and a Canadian mother, Carol Freeman, from Toronto. She has two older sisters, Cassidy and Constance, both of whom play collegiate tennis. Her cousin Freddie Freeman is a professional baseball first baseman and third baseman for the Atlanta Braves of Major League Baseball (MLB). She was a member of Tennis Canada's National Training Centre in Montréal from 2016 to 2019.
WTA career finals
Doubles: 1 (1 runner-up)
Grand Slam tournaments (0–0)
WTA Finals (0–0)
WTA Premier Mandatory & Premier 5 / WTA 1000 (0–0)