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.
Borough
It was previously used in Metropolitan Toronto, Ontario, to denote suburban municipalities including Scarborough, York, North York, Etobicoke prior to their conversion into cities. The Borough of East York was the last Toronto municipality to hold this status, relinquishing it upon becoming part of the City of Toronto on January 1, 1998.