March 6, 1834York, Upper Canada is incorporated as Toronto.
On March 6, 1834, York was incorporated as the City of Toronto. The first mayor of Toronto was William Lyon Mackenzie. However, Toronto was part of the regional division of York County from the late 18th century until the establishment of Metro Toronto in 1954. After 1954, York County was the area north of Steeles Avenue and later renamed York Region in 1971.