R
- Ramona
- Rancho Bernardo
- Rancho Cordova
- Rancho Cucamonga
- Rancho Mirage
- Rancho Palos Verdes
- Rancho Santa Fe
- Rancho Santa Margarita
- Randsburg
- Ravendale
- Red Bluff
- Redcrest
- Redding
- Redlands
- Redondo Beach
- Redway
- Redwood City
- Redwood Estates
- Redwood Shores
- Reedley
- Reseda
- Rialto
- Richmond
- Ridgecrest
- Rio Dell
- Rio Vista
- Ripon
- Riverbank
- Riverside
- Rocklin
- Rohnert Park
- Rolling Hills
- Rolling Hills Estates
- Rosamond
- Rosemead
- Roseville
- Ross
- Rough and Ready
- Round Mountain
- Rowland Heights
- Running Springs
- Rutherford
- Ryde
Read more about this topic: List Of Communities In California