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.
York County, Ontario
At a meeting in Richmond Hill on 6 May 1970, officials representing the municipalities of York County approved plans for the creation of a regional government entity to replace York County. In 1971, the remaining portion of York County was replaced by the Regional Municipality of York also known as York Region.