History of Toronto
In 1998, the six municipalities comprising Metropolitan Toronto – East York, Etobicoke, North York, Scarborough, York, and the old City of Toronto – and its regional government were amalgamated into a single City of Toronto (colloquially dubbed the "megacity") by an act of the Government of Ontario. This was despite a municipal referendum in 1997 that was overwhelmingly against amalgamation. Subsequently, Mel Lastman defeated Barbara Hall to become the first elected mayor of the megacity.
New Toronto
In 1953 the Town of Mimico, Town of New Toronto, Village of Long Branch, Etobicoke Township, Village of Swansea, Village of Forest Hill, Village of Weston, Town of Leaside, East York Township, North York Townsip, York Township, Scarborough Township and City of Toronto joined together to create a new common level of government: Metropolitan Toronto (Metro). Each municipality retained its own town council and government, but several infrastructure departments were transferred to Metro. This lasted until 1967, when the number of municipalities in Metro was reduced.