Municipal government of Toronto
On January 1, 1967, several of the smaller municipalities were amalgamated with larger ones, reducing their number to six. Forest Hill and Swansea became part of Toronto; Long Branch, Mimico, and New Toronto joined Etobicoke; Weston merged with York; and Leaside amalgamated with East York. This arrangement lasted until 1998, when the regional level of government was abolished and Etobicoke, North York, East York, York, and Scarborough were amalgamated into Toronto the "megacity". Mel Lastman, the long-time mayor of North York before the amalgamation, was the first mayor (62nd overall) of the new "megacity" of Toronto, which is the successor of the previous City of Toronto.
Mayor of Toronto
The "City of Toronto" has changed substantially over the years: the city annexed or amalgamated with neighbouring communities or areas 49 times from in 1883 to 1967. The most sweeping change was in 1998, when the six municipalities comprising Metropolitan Toronto—East York, Etobicoke, North York, Scarborough, York, and the former city of Toronto–and its regional government were amalgamated into a single City of Toronto (colloquially dubbed the "megacity") by an act of the provincial government. The newly created position of mayor for the resulting single-tier mega-city replaced all of the mayors of the former Metro municipalities. It also abolished the office of the Metro Chairman, which had formerly been the most senior political figure in the Metro government before amalgamation.