One Yonge Street is a 25-storey office building in Toronto, Ontario, Canada. The building served as the headquarters of Torstar and its flagship newspaper, the Toronto Star, from 1971 to 2022. It is 100 metres tall and built in the International style. It was built as a replacement to the Old Toronto Star Building, which was located at 80 King Street West. That building was torn down to make room for First Canadian Place.