Isabelle Boulay (born 6 July 1972 in Sainte-Félicité, Quebec) is a francophone Canadian pop singer.
In 1993 she represented Radio Canada at the "Truffe de Périgueux" festival held in Périgord, France. She carried off the prize for Best Singer in the "chanson francophone" (francophone song) category. Following her success in France, she was noticed by songwriter Luc Plamondon who was looking for emerging talents to perform in a new production of his rock opera Starmania. There, Boulay portrayed the role of Marie-Jeanne.
In 1996, Isabelle Boulay provided the singing voice for Alys Robi in the television series of the same name. She released her debut album, Fallait pas, that year.