It was created in 1999 as Toronto Centre—Rosedale from most of St. George—St. David and parts of St. Andrew—St. Patrick, Fort York, when ridings were redistributed to match their federal counterparts.

From 1999 to 2007 the riding included the area of Toronto from Avenue Road/University Avenue in the west to the Don River and the city limits in the east and the Mount Pleasant Cemetery and the CPR in the north.

In 2007, the riding was abolished and redistributed mostly into Toronto Centre. It lost the area west of Yonge Street and south of College Street plus Toronto Island to Trinity—Spadina. It also gained some parts of Toronto—Danforth as the riding's east border was altered to continue along the Don River past the former city limits to Pottery Road to Bayview Avenue to the CPR. Another boundary change altered the borders around the Rosehill Reservoir.

The Ontario Legislative Building is located within this district.

On January 6, 2010, a provincial by-election was called in Toronto Centre to replace George Smitherman, who had resigned as MPP to run for mayor of Toronto. The by-election took place on February 4, 2010.

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