York County is a historic county in Upper Canada, Canada West, and the Canadian province of Ontario. It was organized by the Upper Canada administration from the lands of the Toronto Purchase and others.
Colony/Province: Upper Canada (1792–1841) · Province of Canada (1841–1867) · Ontario (1867–1971)
Incorporated: 1792 (created from Home District)
Dissolved: 1971 (reorganized into the Regional Municipality of York)