Longueuil police Const. Mark David said the woman was crossing at Saint-Charles Street West and La Fayette Boulevard, not far from the Longueuil Metro station at around 6:25 p.m. Tuesday when she was struck by the Longueuil Transit bus.
She was rushed to hospital with serious head injuries but was later pronounced dead.
Police collision investigation teams were on scene at the intersection last night trying to determine what happened.
The woman was walking close to the pedestrian crossing when she was hit by the turning bus, police said.
The driver of the bus was interviewed by police, but was not charged.