Barrios de California R
- Racquet Club Estates (17)
- Racquet Club South (4)
- Racquet Club West (14)
- Ramblewood (1)
- Ramona (25)
- Ramona (7)
- Rampart Village (29)
- Rancho Adjacent (30)
- Rancho Bella Vista (11)
- Rancho Bernardo (83)
- Rancho Fontana (2)
- Rancho Niguel (12)
- Rancho Park (14)
- Rancho Penasquitos (56)
- Rancho Ramon (5)
- Rancho Rinconada (4)
- Rancho San Joaquin (7)
- Rancho San Miguel (1)
- Rancho San Rafael (2)
- Rancho Santa Teresa (3)
- Rancho-Del Rey (16)
- Ray Park (1)
- Raymond Hill (2)
- Raynor Park (5)
- Redhawk (11)
- Redwood Heights (18)
- Redwood Oaks (7)
- Redwood Shores (11)
- Redwood Village-Rolando Park (9)
- Renaissance (3)
- Republic Homes (2)
- Reservoir Hill (4)
- Rexland Acres (3)
- Reyes Adobe (3)
- Rheem Valley Manor (2)
- Richland Farms (2)
- Richmond American Homes (2)
- Richmond District (23)
- Richmond Grove (10)
- Ridgeview-Webster (7)
- Riebli-Wallace (1)
- Rimer Area (1)
- Rincon (26)
- Rio Bravo (3)
- River District (2)
- River Oaks (2)
- River Oaks (3)
- Riverglen (1)
- Riverlakes (9)
- Riverpoint (3)
- Riverside (1)
- Riverside Airport (8)
- Riverside Rancho (4)
- Riverview (2)
- Riverview (3)
- Riverview Office Park (1)
- Riverview West (5)
- Riverwalk (7)
- Riviera (15)
- Riviera (2)
- Riviera/Westchester (6)
- Robinhood-Bon Vivant (2)
- Robla (7)
- Rockaway Beach (2)
- Rockridge (5)
- Roeding Park (15)
- Rolando (19)
- Rolling Hills (3)
- Rolling Hills Ranch (4)
- Roosevelt (12)
- Roosevelt (4)
- Roosevelt (4)
- Roripaugh Ranch (3)
- Rose Garden (1)
- Rose Garden (1)
- Rose Glen (2)
- Rose-Sartorette (5)
- Rosebank (2)
- Rosemary Garden (1)
- Rosemont (18)
- Rosemont Square (1)
- Roseville Heights (2)
- Roseville-Fleet Ridge (20)
- Rosewood Baker (2)
- Rossmoor (1)
- Rossmoyne (19)
- Royal Oaks (1)
- RP Sports Complex (10)
- Rubidoux (10)
- Rudgear Meadows (1)
- Russian Hill (14)
- Ruth Hardy Park (4)