1950-51 Ottawa District Senior Playoffs

League Champions

 * Eastern Canada Senior Hockey League: Ottawa RCAF Flyers
 * Rideau Group: Smiths Falls Rideaus
 * Lower Ottawa Valley League: Thurso Lumber Kings

Semi Final
Best of 7

Smiths Falls Rideaus beat Thurso Lumber Kings 4 games to 1.

Final
Best of 7

Smiths Falls Rideaus beat Ottawa RCAF Flyers 4 games to 3.

Smiths Falls Rideaus advanced to the 1950-51 Eastern Canada Allan Cup Playoffs.