Located on the shoreline of the Niagara River in Niagara-on the-Lake, Ontario, Mississauga Point Lighthouse National Historic Site marks the site of the first lighthouse built on the Great Lakes in 1804. While archaeological remains are believed to be situated below what is now the eastern mortar bastion of Fort Mississauga National Historic Site, no aboveground evidence survives. Official recognition refers to the symbolic significance of the vanished lighthouse as represented by the commemorative plaque affixed to the west gate of Fort Mississauga National Historic Site, with a perimeter of 5 metres in radius from the plaque.

Free admission. The site is accessible year-round.