Humber Bay is a bay of Lake Ontario south of Toronto, Ontario, Canada. It is located between Ontario Place on the east and Mimico Creek to the west. The bay gives its name to Etobicoke's Humber Bay neighbourhood.
The area remained natural until later in the 19th century when it became developed with boathouses and various roadhouses and hotels. The Toronto Harbour Commission reshaped the waterfront, infilling the shoreline by 100 yards from the Humber River east to Wilson Park Avenue. In the 1970s, the Toronto and Region Conservation Authority built Humber Bay Park at the foot of Park Lawn Avenue. The only remaining natural shoreline is that east of Wilson Park Avenue, showing a small bluff to the lake side.