1965-66 OHA Senior Season

This is the 1965-66 season of the Ontario Hockey Association's Senior series:

Standings
Note: Kingston Aces played an abbreviated schedule because of the longer distance from the other teams.

Third Place Playoff

 * March 2 Oakville 7 Kingston 3 @ Oakville

Semi Finals
Best of 7

Guelph Royals beat Oakville Oaks 4 games to 3.

Kingston Aces beat Woodstock Athletics 4 games to 2.

Final
Best of 7

Guelph Royals beat Kingston Aces 4 games to 1.

Guelph Royals advanced to the 1965-66 Eastern Canada Allan Cup Playoffs.

Semi Finals
Best of 7

Collingwood Shipbuilders beat Barrie Seven Ups 4 games to 1

Midland Flyers beat Orillia Pepsis 4 games to 1.

Final
Best of 7

Collingwood Shipbuilders beat Midland 4 games to 2.

Collingwood Shipbuilders advanced to the 1965-66 Eastern Canada Allan Cup Playoffs.

Provincial Final
Note: ''There was no official provincial final. The Collingwood Shipbuilders beat Sudbury-Levack Steelworkers in the Eastern Canada Allan Cup quarter final. They then met the Guelph Royals in the semi final.

Best of 7

Guelph Royals beat Collingwood Shipbuilders 4 games to none.