Stijn Desmet (born 10 April 1998) is a Belgian short track speed skater.

Desmet started short track speed skating at a club in Wilrijk at the age of 10.

In 2012, he was scouted by the Belgian short track national team coach Pieter Gysel to participate in the Sport Vlaanderen supported project "Be Gold" to train talented youth professionally in Hasselt, with the Winter Olympics as the main goal.

At the 2016 Winter Youth Olympics in Lillehammer, Norway, he won a gold medal in the mixed relay event in an international team, alongside Desmet consisting of Quentin Fercoq (France), Ane Farstad (Norway) and Kim Ji-yoo (South Korea).

At the 2021 European Short Track Speed Skating Championships, he was 12th in the final standings, and at the World Cup that year, Desmet finished in 9th place.