- Rabbit Island
- Raccoon Island
- Raft River
- Rail Island
- Ramey
- Ramsdell
- Ramsey
- Rands
- Rankin Mill
- Rathdrum
- Raymond
- Rea
- Rebecca
- Reclamation Village
- Red River Hot Springs
- Red Rock Junction
- Regina
- Renfrew
- Reubens
- Reverse
- Rexburg
- Reynolds
- Richards Island
- Richfield
- Rickard Crossing
- Riddle
- Ridgedale
- Rigby
- Riggins
- Riggins Hot Springs