- Robbs
- Rockport
- Rondout
- Rosamond
- Rosemont, St. Clair
- Russell
- Randolph
- Reeds
- Reily Lake
- Rockwood Island
- Roots
- Rozetta
- Rock Island Arsenal
- Rentchler
- Rodemich
- Rose Lake
- Rosemont
- Royal Heights
- Rustic Acres
- Rileyville
- Rudement
- Richland
- Riddle Hill
- Ridgely
- Ray
- Ridgeville
- Riggston
- Rennerville
- Raddle
- Reeds Station