In 1914, it was called "South York", and redefined to consist of the villages of Richmond Hill and Markham, the township of Markham, the town of Leaside, and the township of York (excluding parts included in the riding of West York); and those portions of the city of Toronto not included in the ridings of West York, Parkdale, North Toronto, East Toronto, Centre Toronto, West Toronto, South Toronto and East York. In 1924, it was called "York South", and consisted of all that part of the county of York lying east of Yonge Street, south of the township of Markham and outside the city of Toronto.
