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.
Milliken, Ontario
In 1954, the area south of Steeles Avenue was severed from York County, forming the Municipality of Metropolitan Toronto. As the community was situated along Steeles Avenue, it was split between the two county/regional governments. The southern portion of the community, Milliken, became a part of Metropolitan Toronto, whereas the northern portion of the community, Milliken Mills, remained with York County (reorganized into the Regional Municipality of York in 1971).