East York is a district and former municipality within Toronto, Ontario, Canada. From 1967 to 1998, it was officially the Borough of East York, a borough within the upper-tier municipality of Metropolitan Toronto. The borough was dissolved in 1998 when it was amalgamated with the other lower-tier municipalities of Metropolitan Toronto to form the new "me…East York is a district and former municipality within Toronto, Ontario, Canada. From 1967 to 1998, it was officially the Borough of East York, a borough within the upper-tier municipality of Metropolitan Toronto. The borough was dissolved in 1998 when it was amalgamated with the other lower-tier municipalities of Metropolitan Toronto to form the new "megacity" of Toronto. Prior to its amalgamation, East York was Ontario's last remaining borough.