R
- Rainy River
- (Haliburton County) Rackety
- (Frontenac County) Railton
- (Cochrane District) Ramore
- (Simcoe County) Randolph
- (Dufferin County) Randwick
- (Nipissing District) Rankin
- (Renfrew County) Rankin
- (Perth County) Rannoch
- (United Counties of Leeds and Grenville) Rapid Valley
- (Simcoe County) Rathburn
- (Oxford County) Ratho
- (Lanark County) Rathwell's Shore
- (Perth County) Ratzburg
- (District Municipality of Muskoka) Raymond
- (Frontenac County) Raymonds Corners
- (Oxford County) Rayside
- (Hastings County) Read
- (Dufferin County) Reading
- (United Counties of Leeds and Grenville) Redan
- (Dufferin County) Redickville
- (District Municipality of Muskoka) Redwood
- (Ottawa) Redwood
- (Cochrane District) Reesor
- (Ottawa) Reeve Craig
- (Bruce County) Reid's Corners
- (Regional Municipality of Waterloo) Reid's Mill
- (Regional Municipality of Waterloo) Reidsville
- (Lennox and Addington County) Reidville
- (Ottawa) Revelstoke