R
- Radiant
- Ragged Rapids
- Raglan, Chatham-Kent
- Raglan, Durham Regional Municipality
- Railton
- Rainham Centre
- Rainy River
- Raith
- Rama
- Ramara
- Ramore
- Ramsayville
- Ramsey
- Randall
- Randwick
- Ranelagh
- Ranger Lake
- Rankin, Nipissing District
- Rankin, Renfrew County
- Rannoch
- Rathburn
- Ratho
- Rattlesnake Harbour
- Ratzburg
- Ravenna
- Ravenscliffe
- Ravenshore
- Ravensview
- Ravenswood
- Ravensworth
- Raymond
- Raymonds Corners
- Rayside
- Rayside-Balfour
- Reaboro
- Read
- Reading
- Redan
- Red Bay
- Red Cap Beach
- Redickville
- Redwood
- Red Lake
- Red Rock
- Relessey
- Renfrew
- Renfrew Junction
- Renton
- Restoule
- Rhineland
- Richard's Landing
- Richardson
- Richmond
- Richmond Hill
- Rideau Ferry
- Ridgetown
- Ridgeville
- Ridgeway
- Rimington
- Ripley
- Ritchance
- Riverview
- Riverview Heights
- Riviera Estate
- Rivière-Veuve
- Robbtown
- Robertson's Shore
- Robin Landing
- Roche's Point
- Rockcut
- Rockdale
- Rockfield
- Rockford
- Rockingham
- Rockland
- Rock Mills
- Rockport
- Rocksprings
- Rockwood
- Rocky Saugeen
- Rodney
- Roebuck
- Rolphton
- Ronaldson
- Rosebank
- Rosedale
- Rose Hill
- Rosemont
- Roseneath
- Rosetta
- Roslin
- Rossclair
- Rossport
- Rothwell's Shore
- Rush Point
- Ruskview
- Russell
- Rutherford
- Rutherglen
- Ruthven
- Rutter
- Rydal Bank
Read more about this topic: List Of Communities In Ontario