1965-66 Ottawa District Senior Playoffs

League Champions

 * Algonquin Senior League: Shawville Pontiacs
 * Ottawa St Lawrence Senior League: Morrisburg Combines

Regional Final
Best of 5

Note:Shawville's arena had natural ice so the games had to be switched to Pembroke which had artificial ice.

Morrisburg Combines beat Shawville Pontiacs 3 wins to 1.

Morrisburg Combines advanced to the 1965-66 Eastern Canada Allan Cup Playoffs.