Coordinates: 43°17′21″N 79°50′08″W / 43.289263°N 79.835482°W
Hamilton Harbour, formerly known as Burlington Bay, lies on the western tip of Lake Ontario, bounded on the northwest by the City of Burlington, on the south by the City of Hamilton, and on the east by Hamilton Beach (south of the Burlington Bay James N. Allan Skyway) and Burlington Beach (north of the channel). It is joined to Cootes Paradise by a narrow channel formerly excavated for the Desjardins Canal. Within Hamilton itself, it is referred to as "Hamilton Harbour", "The Harbour" and "The Bay". The bay is naturally separated from Lake Ontario by a sand bar. The opening in the north end was filled in and channel cut in the middle for ships to pass. The Port of Hamilton is located on the Hamilton side of the harbour.
The bay was named in 1792 by John Graves Simcoe, the first lieutenant governor of Upper Canada, for the former name of the town of Bridlington in the East Riding of Yorkshire, England. Access to the bay was important for the early water transportation and industrial development of the area, including Dundas, Ontario, which had an early but ultimately unrealized lead over both Burlington (Brant's Block) and Hamilton.