The provincial riding of York South first came into existence for the
1926 Ontario election. It was slightly smaller than the federal riding but covered much of the same area. For most of the period after
World War II, it was a bastion of the
Ontario CCF and its successor, the
NDP, being the riding of three CCF/NDP leaders in the Ontario legislature,
Ted Jolliffe,
Donald C. MacDonald and
Bob Rae. When the government of
Mike Harris changed Ontario's electoral law so that federal and provincial ridings matched, most of York South was merged into
York South—Weston. Smaller portions of the old riding became parts of
Parkdale—High Park and
Davenport. ==Members of Provincial Parliament==