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- (Algoma) Richards Landing
- (Simcoe County) Rich Hill
- (Oxford County) Richwood
- (Lanark County) Rideau Ferry
- (Ottawa) Rideau Gardens
- (Ottawa) Rideau Glen
- (Ottawa) Rideau Park
- (Ottawa) Rideauview
- (Ottawa) Ridgemont
- (Ottawa) Ridgeview
- (Hastings County) Rimington
- (Bruce County) Ripley
- (Comtés unis de Prescott et Russell) Ritchance
- (Wellington County) Riverbank
- (Middlesex County) Riverside
- (Simcoe County) Riverside
- (Ottawa) Riverside Park
- (Ottawa) Riverside Park South
- (Wellington County) Riverstown
- (Ottawa) Riverview Park
- (Grey County) Robbtown
- (Lanark County) Robertson's Shore
- (Frontenac County) Robertsville
- (Northumberland County) Robin Landing
- (Lennox and Addington County) Roblin
- (Grey County) Rob Roy
- (Renfrew County) Rochefort
- (Renfrew County) Rocher Fendu
- (Ottawa) Rockcliffe Park
- (Peterborough County) Rockdale