Sources told CBC News the body was found about 40 kilometres west of Gatineau, Que., and major crime investigators and Montreal police forensic identification technicians were dispatched to the scene.
Boisvert disappeared from her home on Notre-Dame Street West in Montreal's Southwest borough on Friday night, police said.
Her car, a black 2008 Pontiac G6 with the Quebec licence plate 156-XQG, was spotted in Ottawa on Tuesday, according to an Ottawa police source.
The suspect in the case, 30-year-old Philippe Steele Morin of Gatineau, is still being sought by Montreal police, who are leading the investigation.
Police had previously stated they believe Morin was the last person to see Boisvert.
Gatineau police say Morin has been wanted since July 16 on charges related to an alleged domestic assault, as well as vehicle theft, mischief and breach of probation.