The Art Gallery of Ontario is an art museum in Toronto, Ontario, Canada, located in the Grange Park neighbourhood of downtown Toronto, on Dundas Street West. The building complex takes up 45,000 square metres (480,000 sq ft) of physical space, making it one of the largest art museums in North America and the second-largest art museum in Toronto, after the Royal Ontario Museum. In addition to exhibition spaces, the museum also houses an artist-in-residence office and studio, dining facilities, event spaces, gift shop, library and archives, theatre and lecture hall, research centre, and a workshop.

Grange Park is a neighbourhood in downtown Toronto, Ontario, Canada. It is bounded on the west by Spadina Avenue, on the north by College Street, on the east by University Avenue and on the south by Queen Street West. It is within the 'Kensington-Chinatown' planning neighbourhood of the City of Toronto. Its name is derived from the Grange Park public park. The commercial businesses of Chinatown extend within this neighbourhood.