Barrios de California R
- Racquet Club Estates (15)
- Racquet Club South (3)
- Racquet Club West (13)
- Ramblewood (2)
- Ramona (13)
- Ramona (9)
- Rampart Village (26)
- Rancho Adjacent (36)
- Rancho Bella Vista (7)
- Rancho Bernardo (78)
- Rancho Cordova North (2)
- Rancho Cucamonga (3)
- Rancho Fontana (3)
- Rancho Niguel (7)
- Rancho Park (19)
- Rancho Penasquitos (71)
- Rancho Ramon (5)
- Rancho Rinconada (2)
- Rancho San Joaquin (4)
- Rancho San Miguel (2)
- Rancho San Rafael (2)
- Rancho Santa Teresa (5)
- Rancho-Del Rey (17)
- Ray Park (1)
- Raymond Hill (2)
- Raynor Park (5)
- Redhawk (15)
- Redwood Estates (2)
- Redwood Heights (16)
- Redwood Oaks (6)
- Redwood Shores (26)
- Redwood Village (1)
- Redwood Village-Rolando Park (13)
- Renaissance (3)
- Reservoir Hill (4)
- Rexland Acres (3)
- Reyes Adobe (1)
- Rhapsody (1)
- Rheem Valley Manor (2)
- Richland Farms (1)
- Richmond American Homes (1)
- Richmond Annex (3)
- Richmond District (22)
- Richmond Grove (10)
- Ridgeview-Webster (7)
- Riebli-Wallace (1)
- Rincon (35)
- Rio Bravo (2)
- River District (2)
- River Oaks (2)
- River Oaks (6)
- Riverglen (1)
- Riverlakes (6)
- Riverpoint (1)
- Riverside (1)
- Riverside Airport (6)
- Riverside Rancho (8)
- Riverside Valley Home Gardens (1)
- Riverview (1)
- Riverview (2)
- Riverview Office Park (2)
- Riverview West (7)
- Riverwalk (4)
- Riviera (17)
- Riviera (3)
- Riviera/Westchester (8)
- Robinhood-Bon Vivant (2)
- Robla (6)
- Rockaway Beach (2)
- Rockridge (6)
- Rockspring (1)
- Roeding Park (18)
- Rogers (2)
- Rolando (25)
- Rolling Hills (4)
- Rolling Hills Ranch (3)
- Roosevelt (6)
- Roosevelt (7)
- Roripaugh Ranch (4)
- Rose Garden (2)
- Rose Glen (2)
- Rose-Sartorette (5)
- Rosebank (1)
- Rosemary Garden (1)
- Rosemont (25)
- Roseville Heights (4)
- Roseville-Fleet Ridge (23)
- Rosewood Baker (2)
- Rossmoyne (24)
- Royal Oaks (1)
- RP Sports Complex (15)
- Rubidoux (8)
- Rudgear Meadows (1)
- Russian Hill (15)
- Ruth Hardy Park (4)