Marielle Thompson (born June 15, 1992) is a Canadian freestyle skier specializing in ski cross.

At the end of the 2014 season, she won the World Cup Overall title in an exciting finish in La Plagne, France.

Her teammate and compatriot, Kelsey Serwa, qualified in first place just ahead of Ophelie David of France.

In the big final, Thompson led nearly the entire way, and Serwa trailed just behind after a fall by David.

"[4] While training for the 2018 Winter Olympics in October 2017, Thompson crashed and ruptured her ACL and injured her MCL, putting her participation in the games in jeopardy.

[5] However, she ultimately was able to participate in the Olympic ski cross event, having undergone an accelerated rehabilitation program.