East York
In 1998, East York, along with North York, York, Scarborough, Etobicoke and Old Toronto, were amalgamated into the new "megacity" of Toronto. East York's last mayor was Michael Prue who went on to become city councillor for East York, and then a Member of Provincial Parliament for Beaches—East York in 2001. Between 2002 and 2005, the East York Civic Centre's "True Davidson Council Chamber" was used to hold the Toronto Computer Leasing Inquiry/Toronto External Contracts Inquiry.
Etobicoke
In 1954, Etobicoke Township became a part of the newly formed regional government, the Municipality of Metropolitan Toronto ("Metro"). In 1967, the township of Etobicoke was merged with three small lakeside municipalities — the Village of Long Branch, the Town of New Toronto, and the Town of Mimico — to form the Borough of Etobicoke. The borough was reincorporated as a city in 1984. In 1998, six local municipalities (including Etobicoke) and the Metropolitan Toronto government merged to form the amalgamated city of Toronto.