- Rock Island
- Rock Island
- Rock Island Arsenal
- Rock Run Park
- Rockbridge
- Rockdale
- Rockdale Junction
- Rockefeller
- Rockford
- Rockford Mobile Home Park
- Rockport
- Rockton
- Rockwood
- Rockwood Island
- Rodden
- Rodemich
- Rodgersville
- Rohrer
- Roland
- Rolling Glen
- Rolling Green
- Rolling Greens Mobile Home Park
- Rolling Meadows
- Rollins
- Rollo
- Rombury Oaks
- Rome
- Romeo
- Romeoville
- Rondout