Don Mills is a mixed-use neighbourhood in the North York district of Toronto, Ontario, Canada. It was developed to be a self-supporting "new town" and was at the time located outside of Toronto proper. Consisting of residential, commercial and industrial sub-districts, it was planned and developed by private enterprise. In several ways it became the blueprint for post-war suburban development in Toronto and contemporary residential neighbourhoods. It is bounded by York Mills Road to the north, Canadian Pacific Railway to the south, Leslie Street to the west, and Don Valley Parkway to the east.