California Neighborhoods R
- Racquet Club Estates (13)
- Racquet Club South (1)
- Racquet Club West (5)
- Ramona (20)
- Ramona (3)
- Rampart Village (32)
- Rancho Adjacent (31)
- Rancho Bella Vista (4)
- Rancho Bernardo (71)
- Rancho Fontana (2)
- Rancho Niguel (8)
- Rancho Paraiso (1)
- Rancho Park (16)
- Rancho Penasquitos (44)
- Rancho Ramon (5)
- Rancho Rinconada (2)
- Rancho San Joaquin (3)
- Rancho San Rafael (1)
- Rancho Santa Teresa (2)
- Rancho West (1)
- Rancho-Del Rey (17)
- Ray Park (1)
- Raymond Hill (4)
- Raynor Park (4)
- Redhawk (9)
- Redwood (1)
- Redwood Estates (1)
- Redwood Heights (10)
- Redwood Oaks (4)
- Redwood Shores (10)
- Redwood Village (1)
- Redwood Village-Rolando Park (16)
- Renaissance (3)
- Republic Homes (2)
- Reservoir Hill (2)
- Rexland Acres (4)
- Reyes Adobe (1)
- Rialto Airport (1)
- Richland Farms (1)
- Richmond Annex (2)
- Richmond District (20)
- Richmond Grove (14)
- Ridgeview-Webster (4)
- Rincon (31)
- Rio Bravo (5)
- River District (2)
- River Oaks (1)
- River Oaks (3)
- Riverglen (1)
- Riverlakes (7)
- Riverpoint (2)
- Riverside (1)
- Riverside Airport (4)
- Riverside Rancho (5)
- Riverview (2)
- Riverview (5)
- Riverview Office Park (2)
- Riverview West (3)
- Riverwalk (4)
- Riviera (1)
- Riviera (15)
- Riviera/Westchester (9)
- Roberts-Walnut Woods (1)
- Robinhood-Bon Vivant (2)
- Robla (5)
- Rockridge (2)
- Roeding Park (17)
- Rogers (1)
- Rolando (16)
- Rolling Hills (2)
- Rolling Hills Ranch (4)
- Roosevelt (1)
- Roosevelt (3)
- Roosevelt (7)
- Roripaugh Ranch (1)
- Rose Garden (1)
- Rose Glen (1)
- Rose-Sartorette (2)
- Rosebank (2)
- Rosemary Garden (1)
- Rosemont (25)
- Rosemont Square (3)
- Roseville Heights (4)
- Roseville-Fleet Ridge (22)
- Rosewood Baker (1)
- Rossmoor (1)
- Rossmoyne (13)
- Royal Oaks (1)
- RP Sports Complex (10)
- Rubidoux (12)
- Russian Hill (11)
- Ruth Hardy Park (2)
- Rutherford Park (2)