Marianne St-Gelais (born February 17, 1990) is a Canadian former short track speed skater.

[3] As an accomplished junior skater, and world record holder, St-Gelais placed first overall at the 2007 Canada Games with four gold (500m, 1000m, 3000m and relay) and one silver medal (1500m).

St-Gelais won her first ever World Cup medal in 500m short track speed skating at Vancouver in 2009.

[5][6] She followed this success with a silver medal on February 24, in the 3,000 metre relay, along with Jessica Gregg, Kalyna Roberge and Tania Vicent.

[8] At the World Team Championships St-Gelais was a part of the Canadian squad that won silver in the event.