Alexis Galarneau (born March 2, 1999 in Laval, Québec, Canada) is a Canadian professional tennis player. He reached a career-high ATP singles ranking of No. 320 on November 1, 2021 and a career-high ATP doubles ranking of No. 416 on December 24, 2018.
In 2014, Galarneau won his first ITF junior singles title at the ITF G4 in La Libertad, El Salvador. In 2015, he captured the title in singles at the ITF G2 in Montréal. In 2016, Galarneau claimed two ITF G1 doubles titles, in Istres, France and in Charleroi, Belgium. In 2018, he advanced to his first pro singles final at the Futures in Kelowna, losing to JC Aragone. The same year, he won his first pro doubles title at the ITF Futures in Calgary with compatriot Benjamin Sigouin. He also reached the final at the Futures in Saskatoon, again with Sigouin. At the 2019 Challenger de Gatineau, he defeated first seed and world No. 103 Antoine Hoang in the second round, his best win to date. Also in 2019, Galarneau reached the quarterfinals of the ATP Challenger 125 in Houston where he was defeated by former world No. 14 Ivo Karlović in two tiebreaks. He was a member of the North Carolina State University tennis team from 2016 to 2020. In November 2020, Galarneau won his first singles title, defeating Roberto Quiroz in straight sets at the ITF 15K in Fayetteville.
Galarneau was born to Éric and Chantal Denis in Laval, Québec. His father played in the Ligue de hockey junior majeur du Québec (LHJMQ) for the Castors de Saint-Jean (now the Océanic de Rimouski) and his mother was a gymnast. Galarneau has three siblings, brothers Max-Olivier and Félix, and sister Émilie-Anne. He started playing tennis at age 8. Galarneau was a member of Tennis Canada's National Training Centre in Montréal from 2013 to 2016.