- Redmon
- Richton Park
- Richview
- Ridge Farm
- Ridott
- River Forest
- River Grove
- Riverwoods
- Rock City
- Rock Falls
- Rockbridge
- Rockford
- Rockton
- Rolling Meadows
- Romeoville
- Roodhouse
- Rosewood Heights
- Rosiclare
- Round Lake Beach
- Round Lake Heights
- Round Lake Park
- Royal Lakes
- Randolph
- Royal Acres Trailer Park
- Reader
- Rees
- Rohrer
- Riehl
- Rosedale
- Ramsey Acres