Marielle Thompson (born June 15, 1992) is a Canadian freestyle skier specializing in ski cross. She is the 2014 Winter Olympic and 2019 World champion in women's ski cross, as well as a three-time FIS World Cup Crystal Globe winner as the top-ranked athlete in that discipline (for the 2011–2012, 2013–2014, and 2016–17 seasons) and the 2013 Junior World champion.