- Rancho las Perris
- Rancho Llano Seco
- Rancho Loma Rica
- Rancho Poquitos
- Rancho Rinconada
- Rancho Seco
- Rancho Sonora Estates
- Rancho Tehama Reserve
- Rancho Tierra Grande
- Rancho Trabuco
- Rancho Vista
- Rancho Vista Mobile Home Park
- Rancho Yolo Mobile Home Park
- Ranchos del Oro
- Rand
- Randall
- Randall Island
- Randolph
- Rapid River Mobile Home Park
- Rattlesnake Island
- Ratto Landing
- Ravendale
- Ravenna
- Ravenswood
- Rawhide
- Rawhide
- Rawson
- Raymond
- Raymond Hill
- Rayo