Ontario Peninsula

The corner of the peninsula that lies on Lake Ontario is known as the Golden Horseshoe and forms Canada's largest population centre.

Like other parts of southern Canada, the Ontario Peninsula enjoys warm or hot summers often passing 30°C and rarely 40°C during extreme heatwaves.

The Ontario Peninsula has a humid continental climate; specifically, most of it falls into the Köppen climate classification Dfb except for Essex County, Chatham-Kent, and parts of the Greater Toronto and Hamilton Area and the Niagara Peninsula, which are within the Dfa zone.

The Ontario Peninsula experienced much of the fighting during the War of 1812,[3] including the Americans invading it and burning York (now called Toronto).

By each definition, Toronto or its corresponding entity is the most populous not only in the Ontario Peninsula but also in Canada as a whole.