Sylvain Dupuy (born 22 June 1982) is a French rugby union player.
His position is scrum-half and he currently plays for SU Agen in the Top 14.
He began his career with Stade Toulousain, winning the Heineken Cup as a replacement in 2003, before moving to USA Perpignan in 2005 before moving to SU Agen in 2007.