This is a list of OHA standings and season-by-season summaries of the Ontario Hockey Association's Junior A division from 1933 to 1972, and its Tier I division from 1972 to 1974.
The Toronto St. Michael's Majors won the J. Ross Robertson Cup, defeating the Stratford Midgets 2 games to 0.
Group Semi-finals
Group Finals
Semi-final
Robertson Cup Finals
OHA Grand Championship
The Kitchener Greenshirts won the J. Ross Robertson Cup by default over the Oshawa Majors.
Group Semi-finals
Group Finals
Semi-final
Robertson Cup Final
Quarter-final
Semi-final
Final
The West Toronto Nationals won the J. Ross Robertson Cup, defeating the Kitchener Greenshirts 2 games to 0.
Group Semi-finals
Group Finals
Semi-final
Robertson Cup Final
The Toronto St. Michael's Majors won the J. Ross Robertson Cup, defeating the Stratford Midgets 3 games to 2.
Group Semi-finals
Group Finals
Robertson Cup
The Oshawa Generals won the J. Ross Robertson Cup, defeating the Guelph Indians 3 games to 0.
The Oshawa Generals won the J. Ross Robertson Cup, defeating the Toronto Native Sons 3 games to 0.
The league drops its divisions. The Toronto St. Michael's Majors and the Toronto Lions drop out of the league. The University of Toronto Varsity Blues drop out of the league mid-season. The Oshawa Generals won the J. Ross Robertson Cup, defeating the Toronto Marlboros 3 games to 2.