It happened at around 12:30 a.m. on Thursday on a bus travelling on Lawrence Avenue East.
The woman was sitting down when the man sat beside her and sexually assaulted her. She alerted the driver and the man fled the bus.
The man is described as brown, about 50 years old, standing at 5’8” and 200 lbs. He has grey and black short hair, and a moustache. He was last seen wearing dark shoes, dark coloured pants and a beige sweater over a collared dress shirt.
Police have released a photograph of the suspect taken by a security camera at Lawrence Avenue East and McCowan Road.
Anyone with information is asked to contact police at 416-808-2200 or call Crime Stoppers at 416-222-TIPS (8477). Information can also be submitted online at or by texting TOR and your message to CRIMES (274637).