Frost Building

The Frost Building is a curved 7 and 6 storey office building complex on the south east side of Queen's Park Crescent in Toronto, Ontario, Canada. The building is owned by the Government of Ontario and is part of the large Queen's Park campus. The Frost Building is home to various ministries of the Ontario government, primarily the Ministries of Finance and Infrastructure. It is divided into a north block (6 storey building was home, in 2014, to parts of the Ministry of Finance and Ministry of Infrastructure) and a south block (7 storey Frost Building), with the north block located on 95 Grosvenor Street and the south block located on 7 Queen's Park Crescent. A five storey glass walkway connects the two blocks from the 2nd and 6th floors.

The Frost Building is also commonly referred to as the Ontario Treasury Building. The south block of the building has seven floors; the top floor housing the Office of the Minister of Finance and the Office of the Deputy Minister of Finance. The current Finance Minister of Ontario is Charles Sousa and the Deputy Minister of Finance is Scott Thompson.

The building is a landmark of modern office building architecture in Canada, dating from the early 1950s. It was one of the first totally "modern look" buildings without any of the fancy curlicues of older buildings. It was also original in that it follows the curve of the street on which it resides. It is named for former Premier of Ontario Leslie Frost. The north block was built in the 1960s as an addition to the South Block.

The Ontario Firefighters' Memorial is located in a small parkette to the southwest corner of the building.

Other government buildings nearby include:

The building is served by the Queen's Park (TTC) subway station to the southwest corner.