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.
Humber River—Black Creek
The riding was re-created in 1914 from parts of York Centre and York South when the county of York, including parts of the city of Toronto, was divided into four ridings: York North, South, East and West. West York was defined to consist of the townships of Vaughan and Etobicoke and the villages of Weston, New Toronto, Mimico and Woodbridge and Ward 7 of the city of Toronto; and the portion of the township of York lying between the western limit of the city of Toronto and the township of Etobicoke bounded on the south by Lake Ontario and on the north by Northland Avenue.