East York is a former municipality within the current city of Toronto, Ontario, Canada. It was a semi-autonomous borough within the overall municipality of Metropolitan Toronto before East York, North York, York, Scarborough, Etobicoke and Toronto were amalgamated into the new "megacity" of Toronto in 1998. One of East York's claims to fame was that, before the amalgamation, it was Canada's only borough.
It is separated by the Don River from the former City of Toronto. Traditional East York is southeast of the river, and the neighbourhoods of Leaside, Bennington Heights and densely-populated Thorncliffe Park are northwest of the river. The heart of East York is filled with middle-class and working-class homes, with extensive high-rise developments along peripheral major streets and in Crescent Town and Thorncliffe Park.