Stéphane Roy has received awards at the following contests
- CBC National Radio Competition for Young Composers, Canada: 1988
- Concorso internazionale Luigi Russolo di musica elettroacustica, Varèse (Italy): 1989, 1991, 1992
- Concours international de musique électroacoustique de Bourges, Bourges (Cher, France): 1991
- Musica Nova International Competition of Electroacoustic Music, Prague (Czech Republic): 2023
- Musicworks Electronic Music Composition Contest, Toronto (Ontario, Canada): 2022
- NEWCOMP International Computer Music Competition, Boston (Massachusetts, USA): 1989
- Prix Ars Electronica, Linz (Austria): 1992
- Prix CIME: 2025
- Prix international Noroit-Léonce Petitot de composition musicale acousmatique, Arras (Pas-de-Calais, France): 1993
- Prix Opus, Québec: 2004, 2020, 2025