- R Flourney
- Ramsey
- Rancho Tierra Grande
- Robles Del Rio
- Richmond
- Ratto Landing
- Rocktram
- Red Dog
- Relief
- Ridge View
- Rancho del Avion Capistrano Mobile Home Park
- Rancho Trabuco
- Richfields
- Rainbow
- Rampart
- Ramsey Crossing
- Rawhide
- Ridgewood
- Riego
- Rock Creek
- Rock Creek Camp
- Rock Crest
- Rodgers Flat
- Radec
- Ramona Bowl
- Rancho Dos Palmas
- Rancho las Perris
- Ribbonwood
- Rimlon
- Randall