1921-22 Rideau Season

The 1921-22 Rideau Group playoff champion was won by Smiths Falls. They lost in the quarterfinals of the 1921-22 Ottawa District Senior Playoffs to the Ottawa City Senior League (Group 2) winner Ottawa Gunners in a 2 game total goals series 17 goals to 3 (2-1, 15-2).

Standings
Smiths Falls advanced to the 1921-22 Ottawa District Senior Playoffs.

Lanark County Playoffs

 * Carleton Place Red Wings beat Smiths Falls 7 goals to 5 over two games (1-1)