- Riverside Grove
- Rob Roy Junction
- Rancherie Island
- Rapid River Mobile Home Park
- Reading Island
- Redding Lakeside Mobile Estates
- Redwoods
- Rinckel
- River Park Mobile Estates
- Riverland Mobile Home Park
- Riverview
- Riviera Mobile Estates
- Randolph
- Ranch Mobile Home Park
- Riverwood Mobile Home Estates
- Rodney's Mobile Park
- Río Vista
- Rio Vista Junction
- Rockville
- Roe Island
- Russ Island
- Russell
- Ryer Island
- Ryer Island
- Ramal
- Rancho Vista Mobile Home Park
- Riccas Corner
- Rio Dell
- Roblar
- Rolands